Individually Significant Dispositions - Results of Operations Attributable to Starwood Transaction (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES
Rental income	$ 612,299	$ 594,939	$ 1,216,219	$ 1,211,104
Total revenues	612,480	595,154	1,216,580	1,214,237
EXPENSES
Property and maintenance	99,316	96,307	201,924	205,472
Real estate taxes and insurance	87,503	77,415	169,231	157,611
Property management	21,589	20,991	43,841	44,486
General and administrative	13,626	18,296	27,799	35,013
Total expenses	401,930	389,136	801,659	791,594
Operating income	210,550	206,018	414,921	422,643
Interest and other income	1,162	56,525	1,763	59,583
Interest:
Expense incurred, net	(91,224)	(86,472)	(197,434)	(299,964)
Amortization of deferred financing costs	(2,087)	(2,345)	(4,383)	(7,739)
Income and other tax (expense) benefit	(220)	(413)	(482)	(763)
Net gain (loss) on sales of real estate properties	87,726	57,356	124,433	3,780,835
Income from operations attributable to Noncontrolling Interests – Operating Partnership	(7,354)	(8,780)	(12,765)	(152,089)
Net income attributable to controlling interests	$ 196,041	218,839	$ 339,783	3,806,597
Starwood Portfolio [Member] | Disposal Group, Not Discontinued Operations [Member]
REVENUES
Rental income		304		30,421
Total revenues		304		30,421
EXPENSES
Property and maintenance		33		7,923
Real estate taxes and insurance		60		2,932
Property management		0		2
General and administrative		14		15
Total expenses		107		10,872
Operating income		197		19,549
Interest and other income		9		11
Interest:
Expense incurred, net		(46)		(374)
Amortization of deferred financing costs		0		(707)
Income and other tax (expense) benefit		(1)		(1)
Net gain (loss) on sales of real estate properties		(21)		3,161,200
Income from operations attributable to controlling interests – Operating Partnership		138		3,179,678
Income from operations attributable to Noncontrolling Interests – Operating Partnership		(6)		(122,138)
Net income attributable to controlling interests		$ 132		$ 3,057,540