| United States Inventory: All Residential: Pennsylvania (Unit th) | 24,108.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Idaho (Unit th) | 96.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Illinois (Unit th) | 8,478.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Indiana (Unit th) | 334.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Iowa (Unit th) | 614.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Kentucky (Unit th) | 434.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Louisiana (Unit th) | 666.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Maine (Unit th) | 289.000
            
                                        Jul 2020 | monthly | Jan 2013 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Maryland (Unit th) | 1,266.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Massachusetts (Unit th) | 2,964.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Michigan (Unit th) | 3,261.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Minnesota (Unit th) | 963.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Mississippi (Unit th) | 0.000
            
                                        Nov 2016 | monthly | Jun 2013 - Nov 2016 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Missouri (Unit th) | 585.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Nebraska (Unit th) | 88.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Nevada (Unit th) | 2,062.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: New Hampshire (Unit th) | 616.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: New Jersey (Unit th) | 5,397.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: New Mexico (Unit th) | 115.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: New York (Unit th) | 16,619.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: North Carolina (Unit th) | 1,022.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Ohio (Unit th) | 2,314.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Oklahoma (Unit th) | 189.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Oregon (Unit th) | 822.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Pennsylvania (Unit th) | 1,730.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Rhode Island (Unit th) | 548.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: South Carolina (Unit th) | 3,405.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Tennessee (Unit th) | 1,037.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Texas (Unit th) | 3,702.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Utah (Unit th) | 771.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Vermont (Unit th) | 256.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Virginia (Unit th) | 1,737.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Washington (Unit th) | 1,685.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Condo/Co-op: Wisconsin (Unit th) | 1,811.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Alabama (Unit th) | 27.000
            
                                        Jul 2020 | monthly | Jan 2013 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Arizona (Unit th) | 192.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Arkansas (Unit th) | 24.000
            
                                        Jul 2020 | monthly | Jul 2013 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: California (Unit th) | 2,994.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Colorado (Unit th) | 128.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Connecticut (Unit th) | 1,096.000
            
                                        Jul 2020 | monthly | Feb 2015 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Delaware (Unit th) | 13.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: District of Columbia (Unit th) | 80.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Florida (Unit th) | 1,460.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Georgia (Unit th) | 235.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Hawaii (Unit th) | 23.000
            
                                        May 2020 | monthly | Mar 2012 - May 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Idaho (Unit th) | 24.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Illinois (Unit th) | 1,670.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Indiana (Unit th) | 72.000
            
                                        Jul 2020 | monthly | Oct 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Iowa (Unit th) | 25.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Kansas (Unit th) | 0.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Kentucky (Unit th) | 49.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Louisiana (Unit th) | 309.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Maine (Unit th) | 194.000
            
                                        Jul 2020 | monthly | Jan 2013 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Maryland (Unit th) | 121.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Massachusetts (Unit th) | 896.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Michigan (Unit th) | 516.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Minnesota (Unit th) | 173.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Missouri (Unit th) | 135.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Nebraska (Unit th) | 9.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Nevada (Unit th) | 121.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: New Hampshire (Unit th) | 256.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: New Jersey (Unit th) | 2,632.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: New Mexico (Unit th) | 4.000
            
                                        Mar 2020 | monthly | Apr 2012 - Mar 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: New York (Unit th) | 4,632.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: North Carolina (Unit th) | 130.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Ohio (Unit th) | 877.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Oklahoma (Unit th) | 62.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Oregon (Unit th) | 193.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Pennsylvania (Unit th) | 1,164.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Rhode Island (Unit th) | 374.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: South Carolina (Unit th) | 136.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Tennessee (Unit th) | 91.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Texas (Unit th) | 615.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Utah (Unit th) | 84.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Vermont (Unit th) | 126.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Virginia (Unit th) | 77.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Washington (Unit th) | 216.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: West Virginia (Unit th) | 10.000
            
                                        Jun 2020 | monthly | May 2012 - Jun 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Multi-Family: Wisconsin (Unit th) | 949.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Alabama (Unit th) | 6,655.000
            
                                        Jul 2020 | monthly | Apr 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Arizona (Unit th) | 12,056.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Arkansas (Unit th) | 3,622.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: California (Unit th) | 40,436.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Colorado (Unit th) | 9,833.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Connecticut (Unit th) | 11,407.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Delaware (Unit th) | 889.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: District of Columbia (Unit th) | 244.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Florida (Unit th) | 50,252.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Georgia (Unit th) | 18,078.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Hawaii (Unit th) | 2,560.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Idaho (Unit th) | 1,745.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Illinois (Unit th) | 18,505.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Indiana (Unit th) | 3,127.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Iowa (Unit th) | 1,804.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Kansas (Unit th) | 32.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Kentucky (Unit th) | 4,107.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Louisiana (Unit th) | 4,914.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Maine (Unit th) | 2,784.000
            
                                        Jul 2020 | monthly | Apr 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Maryland (Unit th) | 7,776.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Massachusetts (Unit th) | 6,999.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 | 
                            
                        
                            
                                
                                    
                                        
                                        
                                        | United States Inventory: Single Family: Michigan (Unit th) | 17,036.000
            
                                        Jul 2020 | monthly | Feb 2012 - Jul 2020 |