Escrow Deposits, Prepaid Expenses and Other Assets - Notes Receivable (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) property	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 property	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 property	Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable	$ 35,638	$ 35,638		$ 35,638		$ 6,012
Secured Promissory Note Maturing June 2025 | Disposal Group, Not Discontinued Operations | Bulk Portfolio Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Note receivable, gross	$ 30,700	30,700		30,700
Interest rate through October 31, 2019	2.70%
Interest rate thereafter through maturity	4.50%
Unamortized discount	$ 1,200	1,200		1,200
Notes receivable	$ 29,500	$ 29,500		$ 29,500
Single Family Homes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties sold | property		433	113	613	216
Single Family Homes | Disposal Group, Not Discontinued Operations | Bulk Portfolio Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties sold | property	215