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Single-Family Properties (Details 2) - Single family homes - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property Subject to or Available for Operating Lease      
Net book value $ 8.5 $ 114.6  
Depreciation expense $ 223.9 $ 150.5 $ 60.3