Dispositions and Assets Held for Sale - Dispositions and Assets Held for Sale (Details) - Disposal group, disposed of by sale, not discontinued operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 36,481	$ 177,276	$ 107,933	$ 355,819
Expenses:
Interest expense	1,622	4,210	4,591	8,420
Property operating expenses	23,850	101,416	63,300	207,340
Provision for depreciation	7,637	29,488	18,254	58,692
Total expenses	33,109	135,114	86,145	274,452
Income (loss) from real estate dispositions, net	$ 3,372	$ 42,162	$ 21,788	$ 81,367