Acquisitions - Estimated Fair Values of Assets and Liabilities Acquired (Details) - American Residential Properties Inc. - USD ($) $ in Thousands		6 Months Ended
	Feb. 29, 2016	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Land	$ 262,396
Buildings and improvements	1,014,857
Net assets acquired	15,499
Restricted cash	9,521
Rent and other receivables	843
Escrow deposits, prepaid expenses and other assets	35,134
In-place leases	22,696
Accounts payable and accrued expenses	(38,485)
Net assets acquired	1,322,461
Total debt assumed	792,001
Equity transaction consideration	530,460
Total transaction consideration	1,322,461
Credit facility
Business Acquisition [Line Items]
Total debt assumed	350,000	$ 350,000	$ 0
Exchangeable senior notes
Business Acquisition [Line Items]
Total debt assumed	112,298	112,298	0
Asset-backed securitization
Business Acquisition [Line Items]
Total debt assumed	$ 329,703	$ 329,703	$ 0