Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred Shares	Common Shares	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Distributions in Excess of Retained Earnings	Total Shareholders' Equity	Non-Controlling Interests
Preferred stock, beginning balance (in shares) at Dec. 31, 2018		20,400,000
Common stock, beginning balance (in shares) at Dec. 31, 2018			130,311,289
Beginning balance at Dec. 31, 2018	$ 3,769,930	$ 204	$ 1,303	$ 4,065,804	$ 1,330	$ (308,806)	$ 3,759,835	$ 10,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares, offering costs	(275)			(275)			(275)
Issuance of common shares for Board of Trustees compensation (in shares)			25,282
Issuance of common shares for Board of Trustees compensation	740		$ 1	739			740
Repurchase of common shares (in shares)			(126,681)
Repurchase of common shares	(4,009)		$ (1)	(4,008)			(4,009)
Share-based compensation (in shares)			275,066
Share-based compensation	3,966		$ 2	3,412			3,414	552
Distributions on common shares/units	(99,845)					(99,539)	(99,539)	(306)
Distributions on preferred shares	(16,278)					(16,278)	(16,278)
Other comprehensive income (loss):
Unrealized gain (loss) on derivative instruments	(30,128)				(30,128)		(30,128)
Net income (loss)	66,173					66,008	66,008	165
Preferred stock, ending balance (in shares) at Jun. 30, 2019		20,400,000
Common stock, ending balance (in shares) at Jun. 30, 2019			130,484,956
Ending balance at Jun. 30, 2019	3,690,274	$ 204	$ 1,305	4,065,672	(28,798)	(358,615)	3,679,768	10,506
Preferred stock, beginning balance (in shares) at Mar. 31, 2019		20,400,000
Common stock, beginning balance (in shares) at Mar. 31, 2019			130,484,956
Beginning balance at Mar. 31, 2019	3,706,799	$ 204	$ 1,305	4,063,830	(7,709)	(361,081)	3,696,549	10,250
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,118			1,842			1,842	276
Distributions on common shares/units	(49,933)					(49,768)	(49,768)	(165)
Distributions on preferred shares	(8,139)					(8,139)	(8,139)
Other comprehensive income (loss):
Unrealized gain (loss) on derivative instruments	(21,089)				(21,089)		(21,089)
Net income (loss)	60,518					60,373	60,373	145
Preferred stock, ending balance (in shares) at Jun. 30, 2019		20,400,000
Common stock, ending balance (in shares) at Jun. 30, 2019			130,484,956
Ending balance at Jun. 30, 2019	$ 3,690,274	$ 204	$ 1,305	4,065,672	(28,798)	(358,615)	3,679,768	10,506
Preferred stock, beginning balance (in shares) at Dec. 31, 2019	20,400,000	20,400,000
Common stock, beginning balance (in shares) at Dec. 31, 2019	130,484,956		130,484,956
Beginning balance at Dec. 31, 2019	$ 3,631,936	$ 204	$ 1,305	4,069,410	(24,715)	(424,996)	3,621,208	10,728
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares, offering costs	(94)			(94)			(94)
Issuance of common shares for Board of Trustees compensation (in shares)			23,528
Issuance of common shares for Board of Trustees compensation	637		$ 1	636			637
Repurchase of common shares (in shares)			(47,507)
Repurchase of common shares	(1,255)		$ (1)	(1,254)			(1,255)
Share-based compensation (in shares)			103,083
Share-based compensation	19,416		$ 1	8,799			8,800	10,616
Distributions on common shares/units	(2,100)					(2,076)	(2,076)	(24)
Distributions on preferred shares	(16,278)					(16,278)	(16,278)
Other comprehensive income (loss):
Unrealized gain (loss) on derivative instruments	(54,670)				(54,670)		(54,670)
Net income (loss)	$ (88,846)					(88,564)	(88,564)	(282)
Preferred stock, ending balance (in shares) at Jun. 30, 2020	20,400,000	20,400,000
Common stock, ending balance (in shares) at Jun. 30, 2020	130,564,060		130,564,060
Ending balance at Jun. 30, 2020	$ 3,488,746	$ 204	$ 1,306	4,077,497	(79,385)	(531,914)	3,467,708	21,038
Preferred stock, beginning balance (in shares) at Mar. 31, 2020		20,400,000
Common stock, beginning balance (in shares) at Mar. 31, 2020			130,563,226
Beginning balance at Mar. 31, 2020	3,627,766	$ 204	$ 1,306	4,075,727	(78,980)	(391,950)	3,606,307	21,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares, offering costs	(9)			(9)			(9)
Share-based compensation (in shares)			834
Share-based compensation	1,779			1,779			1,779
Distributions on common shares/units	(1,332)					(1,312)	(1,312)	(20)
Distributions on preferred shares	(8,139)					(8,139)	(8,139)
Other comprehensive income (loss):
Unrealized gain (loss) on derivative instruments	(405)				(405)		(405)
Net income (loss)	$ (130,914)					(130,513)	(130,513)	(401)
Preferred stock, ending balance (in shares) at Jun. 30, 2020	20,400,000	20,400,000
Common stock, ending balance (in shares) at Jun. 30, 2020	130,564,060		130,564,060
Ending balance at Jun. 30, 2020	$ 3,488,746	$ 204	$ 1,306	$ 4,077,497	$ (79,385)	$ (531,914)	$ 3,467,708	$ 21,038