Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred Shares	Common Shares	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Distributions in Excess of Retained Earnings	Total Shareholders' Equity	Total Shareholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Non-Controlling Interests
Beginning balance (in shares) at Dec. 31, 2019		20,400,000	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, net of 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	21,076		$ 1	10,459				10,460		10,616
Distributions on common shares/units	(3,410)						(3,383)	(3,383)		(27)
Distributions on preferred shares	(24,417)						(24,417)	(24,417)
Redemption of non-controlling interest (in shares)			109,240
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	0		$ 1	13,445				13,446		(13,446)
Other comprehensive income (loss):
Change in fair value of derivative instruments	(64,629)					(64,629)		(64,629)
Amounts reclassified from other comprehensive income	19,681					19,681		19,681
Net income (loss)	(219,406)						(218,871)	(218,871)		(535)
Ending balance (in shares) at Sep. 30, 2020		20,400,000	130,673,300
Ending balance at Sep. 30, 2020	3,360,119	$ 204	$ 1,307	4,092,602		(69,663)	(671,667)	3,352,783		7,336
Beginning balance (in shares) at Jun. 30, 2020		20,400,000	130,564,060
Beginning balance at Jun. 30, 2020	3,488,746	$ 204	$ 1,306	4,077,497		(79,385)	(531,914)	3,467,708		21,038
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,660			1,660				1,660
Distributions on common shares/units	(1,310)						(1,307)	(1,307)		(3)
Distributions on preferred shares	(8,139)						(8,139)	(8,139)
Redemption of non-controlling interest (in shares)			109,240
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	0		$ 1	13,445				13,446		(13,446)
Other comprehensive income (loss):
Change in fair value of derivative instruments	790					790		790
Amounts reclassified from other comprehensive income	8,932					8,932		8,932
Net income (loss)	(130,560)						(130,307)	(130,307)		(253)
Ending balance (in shares) at Sep. 30, 2020		20,400,000	130,673,300
Ending balance at Sep. 30, 2020	3,360,119	$ 204	$ 1,307	4,092,602		(69,663)	(671,667)	3,352,783		7,336
Beginning balance (in shares) at Dec. 31, 2020		20,400,000	130,673,300
Beginning balance at Dec. 31, 2020	3,264,326	$ 204	$ 1,307	4,169,870	$ (113,099)	(60,071)	(853,973)	3,257,337	$ (113,099)	6,989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred shares (in shares)		(10,000,000)
Redemption of preferred shares	(250,000)	$ (100)		(241,857)			(8,043)	(250,000)
Issuance of shares, net of offering costs (in shares)		19,200,000
Issuance of shares, net of offering costs	464,106	$ 192		463,914				464,106
Issuance of common shares for Board of Trustees compensation (in shares)			27,711
Issuance of common shares for Board of Trustees compensation	516		$ 1	515				516
Repurchase of common shares (in shares)			(38,310)
Repurchase of common shares	(720)		$ (1)	(719)				(720)
Share-based compensation (in shares)			151,049
Share-based compensation	9,791		$ 1	8,046				8,047		1,744
Distributions on common shares/units	(3,754)						(3,713)	(3,713)		(41)
Distributions on preferred shares	(30,761)						(30,761)	(30,761)
Other adjustment	0					393		393		(393)
Purchases of capped calls in connection with convertible senior notes				(20,975)				(20,975)
Other comprehensive income (loss):
Change in fair value of derivative instruments	7,103					6,930		6,930		173
Amounts reclassified from other comprehensive income	19,319					19,319		19,319
Net income (loss)	(143,550)						(142,465)	(142,465)		(1,085)
Ending balance (in shares) at Sep. 30, 2021		29,600,000	130,813,750
Ending balance at Sep. 30, 2021	3,202,302	$ 296	$ 1,308	4,265,695		(33,429)	(1,038,955)	3,194,915		7,387
Beginning balance (in shares) at Jun. 30, 2021		29,600,000	130,813,750
Beginning balance at Jun. 30, 2021	3,238,646	$ 296	$ 1,308	4,263,473		(39,820)	(993,654)	3,231,603		7,043
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred shares (in shares)		(10,000,000)
Redemption of preferred shares	(250,000)	$ (100)		(241,857)			(8,043)	(250,000)
Issuance of shares, net of offering costs (in shares)		10,000,000
Issuance of shares, net of offering costs	241,776	$ 100		241,676				241,776
Share-based compensation	3,100			2,403				2,403		697
Distributions on common shares/units	(1,325)						(1,317)	(1,317)		(8)
Distributions on preferred shares	(12,528)						(12,528)	(12,528)
Other adjustment	0					393		393		(393)
Other comprehensive income (loss):
Change in fair value of derivative instruments	(323)					(496)		(496)		173
Amounts reclassified from other comprehensive income	6,494					6,494		6,494
Net income (loss)	(23,538)						(23,413)	(23,413)		(125)
Ending balance (in shares) at Sep. 30, 2021		29,600,000	130,813,750
Ending balance at Sep. 30, 2021	$ 3,202,302	$ 296	$ 1,308	$ 4,265,695		$ (33,429)	$ (1,038,955)	$ 3,194,915		$ 7,387