CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (unaudited) - USD ($) $ in Thousands	Total	Interest Rate Swap	Redeemable Noncontrolling Interests -- Operating Partnership	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Dividends in Excess of Earnings	Accumulated Other Comprehensive Loss, Net	Accumulated Other Comprehensive Loss, Net Interest Rate Swap	Total Stockholders’ Equity	Total Stockholders’ Equity Interest Rate Swap	Noncontrolling Interests in Operating Partnership	Noncontrolling Interests in Operating Partnership Interest Rate Swap	Noncontrolling Interests in Consolidated Joint Ventures	Total Noncontrolling Interests	Total Noncontrolling Interests Interest Rate Swap
Beginning balance at Dec. 31, 2017	$ 11,049,450		$ 53,902	$ 1,249,560	$ 2,044	$ 11,261,461	$ (2,055,552)	$ (108,432)		$ 10,349,081		$ 698,126		$ 2,243	$ 700,369
Beginning balance (shares) at Dec. 31, 2017					205,470,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock					$ 2	15,199				15,201		(15,201)			(15,201)
Conversion of common units to common stock (shares)					168,367
Issuance of unvested restricted stock, net of forfeitures (shares)					251,187
Issuance of common stock, net of offering costs	(12)					(12)				(12)
Shares issued under employee stock purchase plan	2,509					2,509				2,509
Shares issued under employee stock purchase plan (shares)					31,893
Shares repurchased and retired to satisfy tax withholding upon vesting	(4,718)				$ (1)	(4,717)				(4,718)
Shares repurchased and retired to satisfy tax withholding upon vesting (shares)					(46,833)
Amortization of share-based compensation	7,515					7,515				7,515
Reclassification of vested share-based awards						(2,497)				(2,497)		2,497			2,497
Adjustment to redeemable noncontrolling interests—operating partnership	4,031		(4,031)			4,031				4,031
Dividends declared on preferred stock	(20,329)						(20,329)			(20,329)
Dividends and distributions on common stock and common and incentive units	(216,697)		0				(208,015)			(208,015)		(8,682)			(8,682)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions	62													62	62
Net income	110,095		0				106,627			106,627		3,480		(12)	3,468
Other comprehensive loss—foreign currency translation adjustments	(3,743)							(3,598)		(3,598)		(145)			(145)
Other comprehensive income—fair value of interest rate swaps	8,616	$ 8,616							$ 8,282		$ 8,282		$ 334			$ 334
Other comprehensive loss—reclassification of accumulated other comprehensive income to interest expense	(235)							(226)		(226)		(9)			(9)
Ending balance at Mar. 31, 2018	10,936,544		49,871	1,249,560	$ 2,045	11,283,489	(2,177,269)	(103,974)		10,253,851		680,400		2,293	682,693
Ending balance (shares) at Mar. 31, 2018					205,874,914
Beginning balance at Dec. 31, 2018	10,858,210		15,832	1,249,560	$ 2,051	11,355,751	(2,633,071)	(115,647)		9,858,644		906,510		93,056	999,566
Beginning balance (shares) at Dec. 31, 2018					206,425,656
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock					$ 15	135,994				136,009		(136,009)			(136,009)
Conversion of common units to common stock (shares)					1,517,876
Issuance of unvested restricted stock, net of forfeitures (shares)					245,373
Issuance of common stock, net of offering costs	(375)					(375)				(375)
Shares issued under employee stock purchase plan	2,259					2,259				2,259
Shares issued under employee stock purchase plan (shares)					25,234
Issuance of series K preferred stock, net of offering costs	203,423			203,423						203,423
Amortization of share-based compensation	8,400					8,400				8,400
Reclassification of vested share-based awards						(7,320)				(7,320)		7,320			7,320
Adjustment to redeemable noncontrolling interests—operating partnership	(1,943)		1,943			(1,943)				(1,943)
Dividends declared on preferred stock	(20,329)						(20,329)			(20,329)
Dividends and distributions on common stock and common and incentive units	(234,983)		(169)				(224,802)			(224,802)		(10,181)			(10,181)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions	28,219													28,219	28,219
Net income	120,925		72				116,812			116,812		4,228		(115)	4,113
Other comprehensive loss—foreign currency translation adjustments	30,880							29,567		29,567		1,313			1,313
Other comprehensive income—fair value of interest rate swaps	(3,775)	$ (3,775)							$ (3,614)		$ (3,614)		$ (161)			$ (161)
Other comprehensive loss—reclassification of accumulated other comprehensive income to interest expense	(2,094)							(2,005)		(2,005)		(89)			(89)
Ending balance at Mar. 31, 2019	$ 10,982,499		$ 17,678	$ 1,452,983	$ 2,066	$ 11,492,766	$ (2,767,708)	$ (91,699)		$ 10,088,408		$ 772,931		$ 121,160	$ 894,091
Ending balance (shares) at Mar. 31, 2019					208,214,139