CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Series E Cumulative Redeemable Preferred Stock Preferred Stock	Series E Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series E Cumulative Redeemable Preferred Stock	Series F Cumulative Redeemable Preferred Stock Preferred Stock	Series F Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series F Cumulative Redeemable Preferred Stock	Common Stock	Additional Paid In Capital	Retained Earnings	Cumulative dividends and distributions	Noncontrolling Interest in Consolidated Joint Venture	Total
Beginning Balance at Dec. 31, 2018	$ 115,000			$ 75,000			$ 2,282	$ 2,728,684	$ 1,182,722	$ (1,440,202)	$ 47,685	$ 2,711,171
Beginning Balance (in shares) at Dec. 31, 2018	4,600,000			3,000,000			228,246,247
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								2,221				2,221
Issuance of restricted common stock, net							$ 4	(4,439)				(4,435)
Issuance of restricted common stock, net (in shares)							345,132
Forfeiture of restricted common stock (in shares)							(3,932)
Common stock distributions and distributions payable										(11,429)		(11,429)
Preferred stock dividends and dividends payable		$ (1,998)	$ (1,998)		$ (1,209)	$ (1,209)
Distributions to noncontrolling interest											(1,950)	(1,950)
Net (loss) income									16,317		1,599	17,916
Ending Balance at Mar. 31, 2019	$ 115,000			$ 75,000			$ 2,286	2,726,466	1,199,039	(1,454,838)	47,334	2,710,287
Ending Balance (in shares) at Mar. 31, 2019	4,600,000			3,000,000			228,587,447
Beginning Balance at Dec. 31, 2018	$ 115,000			$ 75,000			$ 2,282	2,728,684	1,182,722	(1,440,202)	47,685	2,711,171
Beginning Balance (in shares) at Dec. 31, 2018	4,600,000			3,000,000			228,246,247
Increase (Decrease) in Stockholders' Equity
Net (loss) income												97,379
Ending Balance at Sep. 30, 2019	$ 115,000			$ 75,000			$ 2,249	2,681,754	1,274,039	(1,483,907)	48,384	2,712,519
Ending Balance (in shares) at Sep. 30, 2019	4,600,000			3,000,000			224,861,978
Beginning Balance at Mar. 31, 2019	$ 115,000			$ 75,000			$ 2,286	2,726,466	1,199,039	(1,454,838)	47,334	2,710,287
Beginning Balance (in shares) at Mar. 31, 2019	4,600,000			3,000,000			228,587,447
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								3,002				3,002
Issuance of restricted common stock, net (in shares)							51,840
Common stock distributions and distributions payable										(11,411)		(11,411)
Preferred stock dividends and dividends payable		(1,998)	(1,998)		(1,209)	(1,209)
Distributions to noncontrolling interest											(788)	(788)
Repurchases of outstanding common stock							$ (4)	(5,731)				(5,735)
Repurchases of outstanding common stock (in shares)							(432,464)
Net (loss) income									43,963		1,955	45,918
Ending Balance at Jun. 30, 2019	$ 115,000			$ 75,000			$ 2,282	2,723,737	1,243,002	(1,469,456)	48,501	2,738,066
Ending Balance (in shares) at Jun. 30, 2019	4,600,000			3,000,000			228,206,823
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								2,249				2,249
Common stock distributions and distributions payable										(11,243)		(11,243)
Preferred stock dividends and dividends payable		(1,998)	(1,998)		(1,210)	(1,210)
Distributions to noncontrolling interest											(2,625)	(2,625)
Repurchases of outstanding common stock							$ (33)	(44,232)				(44,265)
Repurchases of outstanding common stock (in shares)							(3,344,845)
Net (loss) income									31,037		2,508	33,545
Ending Balance at Sep. 30, 2019	$ 115,000			$ 75,000			$ 2,249	2,681,754	1,274,039	(1,483,907)	48,384	2,712,519
Ending Balance (in shares) at Sep. 30, 2019	4,600,000			3,000,000			224,861,978
Beginning Balance at Dec. 31, 2019	$ 115,000			$ 75,000			$ 2,249	2,683,913	1,318,455	(1,619,779)	46,233	2,621,071
Beginning Balance (in shares) at Dec. 31, 2019	4,600,000			3,000,000			224,855,351
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								2,324				2,324
Issuance of restricted common stock, net							$ 4	(3,996)				(3,992)
Issuance of restricted common stock, net (in shares)							456,219
Forfeiture of restricted common stock (in shares)							(355)
Common stock distributions and distributions payable										(10,777)		(10,777)
Preferred stock dividends and dividends payable		(1,998)	(1,998)		(1,209)	(1,209)
Distributions to noncontrolling interest											(2,000)	(2,000)
Repurchases of outstanding common stock							$ (98)	(103,796)				(103,894)
Repurchases of outstanding common stock (in shares)							(9,770,081)
Net (loss) income									(162,061)		(458)	(162,519)
Ending Balance at Mar. 31, 2020	$ 115,000			$ 75,000			$ 2,155	2,578,445	1,156,394	(1,633,763)	43,775	2,337,006
Ending Balance (in shares) at Mar. 31, 2020	4,600,000			3,000,000			215,541,134
Beginning Balance at Dec. 31, 2019	$ 115,000			$ 75,000			$ 2,249	2,683,913	1,318,455	(1,619,779)	46,233	2,621,071
Beginning Balance (in shares) at Dec. 31, 2019	4,600,000			3,000,000			224,855,351
Increase (Decrease) in Stockholders' Equity
Net (loss) income												(371,126)
Ending Balance at Sep. 30, 2020	$ 115,000			$ 75,000			$ 2,156	2,584,005	951,765	(1,640,178)	40,297	2,128,045
Ending Balance (in shares) at Sep. 30, 2020	4,600,000			3,000,000			215,635,550
Beginning Balance at Mar. 31, 2020	$ 115,000			$ 75,000			$ 2,155	2,578,445	1,156,394	(1,633,763)	43,775	2,337,006
Beginning Balance (in shares) at Mar. 31, 2020	4,600,000			3,000,000			215,541,134
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								3,193				3,193
Issuance of restricted common stock, net							$ 1	(1)
Issuance of restricted common stock, net (in shares)							94,416
Preferred stock dividends and dividends payable		(1,998)	(1,998)		(1,209)	(1,209)
Contribution from noncontrolling interest											500	500
Net (loss) income									(115,338)		(2,162)	(117,500)
Ending Balance at Jun. 30, 2020	$ 115,000			$ 75,000			$ 2,156	2,581,637	1,041,056	(1,636,970)	42,113	2,219,992
Ending Balance (in shares) at Jun. 30, 2020	4,600,000			3,000,000			215,635,550
Increase (Decrease) in Stockholders' Equity
Amortization of deferred stock compensation								2,368				2,368
Preferred stock dividends and dividends payable		$ (1,998)	$ (1,998)		$ (1,210)	$ (1,210)
Net (loss) income									(89,291)		(1,816)	(91,107)
Ending Balance at Sep. 30, 2020	$ 115,000			$ 75,000			$ 2,156	$ 2,584,005	$ 951,765	$ (1,640,178)	$ 40,297	$ 2,128,045
Ending Balance (in shares) at Sep. 30, 2020	4,600,000			3,000,000			215,635,550