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Fair Value Measurements - Impaired Assets, Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Investments in single-family residential properties, net held for use and held for sale impairment adjustments        
Total impairments $ (1,037) $ 0    
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 | Rental Properties        
Investments in single-family residential properties, net held for use and held for sale impairment adjustments        
Pre-impairment amount     $ 496 $ 0
Total impairments (267) 0    
Fair value 229 0    
Rental Properties | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3        
Investments in single-family residential properties, net held for use and held for sale impairment adjustments        
Pre-impairment amount     $ 7,242 $ 0
Total impairments (770) 0    
Fair value $ 6,472 $ 0