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Single-Family Properties - Narrative (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2017
property
Dec. 31, 2017
USD ($)
property
Dec. 31, 2016
USD ($)
property
Dec. 31, 2015
USD ($)
Property Subject to or Available for Operating Lease        
Net proceeds received from sales of single-family properties and other   $ 87,063,000 $ 88,590,000 $ 0
Goodwill written off, sale of single-family properties     400,000  
Goodwill   120,279,000 120,279,000  
Insurance settlements receivable   8,900,000    
Hurricane-related charges, net   7,963,000 0 0
Natural Disasters and Other Casualty Events        
Property Subject to or Available for Operating Lease        
Number of homes with major damage | property 125      
Number of homes with minor damage | property 3,400      
Impairment charge to write down the net book values of the impacted properties   11,000,000    
Additional repair, remediation and other costs   5,900,000    
Aggregate net book value of the impacted properties   7,100,000    
Single family homes        
Property Subject to or Available for Operating Lease        
Real estate investment properties unrecorded deed   44,200,000 14,300,000  
Depreciation expense   $ 281,200,000 $ 262,100,000 $ 223,900,000
Number of properties sold | property   923 712  
Net proceeds received from sales of single-family properties and other   $ 72,600,000 $ 88,600,000  
Gain on sale of single-family properties, net   3,600,000 $ 13,900,000  
Receivable with imputed interest, face amount   7,000,000    
Receivable with imputed interest discount   $ 1,500,000