CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Stockholders’ Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Cumulative Dividends in Excess of Earnings	Noncontrolling Interests
Beginning balance at Dec. 31, 2018	$ 3,334,914	$ 3,256,024	$ 2,053	$ 4,525,969	$ 307	$ (1,272,305)	$ 78,890
Beginning balance (in shares) at Dec. 31, 2018			205,267,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based award transactions, net	3,389	3,389	$ 3	3,386
Share-based award transactions, net (in shares)			293,000
Repurchase and cancellation of common stock	(11,926)	(11,926)	$ (5)	(11,921)
Repurchase and cancellation of common stock (in shares)			(478,000)
Redemption of noncontrolling interest and other	0	527		527			(527)
Redemption of noncontrolling interest and other (in shares)			18,000
Dividends declared	(64,884)	(63,578)				(63,578)
Dividends declared							(1,306)
Net income (loss)	13,673	13,440				13,440	233
Other comprehensive income (loss)	(390)	(382)			(382)		(8)
Ending balance at Mar. 31, 2019	3,274,776	3,197,494	$ 2,051	4,517,961	(75)	(1,322,443)	77,282
Ending balance (in shares) at Mar. 31, 2019			205,100,000
Beginning balance at Dec. 31, 2018	3,334,914	3,256,024	$ 2,053	4,525,969	307	(1,272,305)	78,890
Beginning balance (in shares) at Dec. 31, 2018			205,267,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	1,519
Ending balance at Sep. 30, 2019	3,214,469	3,141,686	$ 2,072	4,581,176	1,798	(1,443,360)	72,783
Ending balance (in shares) at Sep. 30, 2019			207,186,000
Beginning balance at Mar. 31, 2019	3,274,776	3,197,494	$ 2,051	4,517,961	(75)	(1,322,443)	77,282
Beginning balance (in shares) at Mar. 31, 2019			205,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of OP Units in HTALP							2,603
Issuance of common stock, net	2,603
Share-based award transactions, net	2,102	2,102		2,102
Share-based award transactions, net (in shares)			3,000
Repurchase and cancellation of common stock	(169)	(169)		(169)
Repurchase and cancellation of common stock (in shares)			(6,000)
Redemption of noncontrolling interest and other	424	1,209		1,209			(785)
Redemption of noncontrolling interest and other (in shares)			27,000
Dividends declared	(64,913)	(63,579)				(63,579)
Dividends declared							(1,334)
Net income (loss)	16,560	16,259				16,259	301
Other comprehensive income (loss)	(381)	(374)			(374)		(7)
Ending balance at Jun. 30, 2019	3,231,002	3,152,942	$ 2,051	4,521,103	(449)	(1,369,763)	78,060
Ending balance (in shares) at Jun. 30, 2019			205,118,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net	51,804	51,804	$ 19	51,785
Issuance of common stock, net (in shares)			1,840,000
Issuance of limited partner OP Units in connection with acquisitions	2,000						2,000
Share-based award transactions, net	2,337	2,337		2,337
Share-based award transactions, net (in shares)			31,000
Repurchase and cancellation of common stock	(65)	(65)		(65)
Repurchase and cancellation of common stock (in shares)			(2,000)
Redemption of noncontrolling interest and other	67	6,018	$ 2	6,016			(5,951)
Redemption of noncontrolling interest and other (in shares)			199,000
Dividends declared	(66,389)	(65,134)				(65,134)
Dividends declared							(1,255)
Net income (loss)	(8,577)	(8,463)				(8,463)	(114)
Other comprehensive income (loss)	2,290	2,247			2,247		43
Ending balance at Sep. 30, 2019	3,214,469	3,141,686	$ 2,072	4,581,176	1,798	(1,443,360)	72,783
Ending balance (in shares) at Sep. 30, 2019			207,186,000
Beginning balance at Dec. 31, 2019	$ 3,430,644	3,358,009	$ 2,165	4,854,042	4,546	(1,502,744)	72,635
Beginning balance (in shares) at Dec. 31, 2019	216,453,312		216,453,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net	$ 50,020	50,020	$ 17	50,003
Issuance of common stock, net (in shares)			1,675,000
Share-based award transactions, net	3,203	3,203	$ 2	3,201
Share-based award transactions, net (in shares)			236,000
Repurchase and cancellation of common stock	(4,624)	(4,624)	$ (2)	(4,622)
Repurchase and cancellation of common stock (in shares)			(154,000)
Redemption of noncontrolling interest and other	0	6,776	$ 3	6,773			(6,776)
Redemption of noncontrolling interest and other (in shares)			273,000
Dividends declared	(70,001)	(68,867)				(68,867)
Dividends declared							(1,134)
Net income (loss)	18,208	17,901				17,901	307
Other comprehensive income (loss)	(22,498)	(22,138)			(22,138)		(360)
Ending balance at Mar. 31, 2020	3,404,952	3,340,280	$ 2,185	4,909,397	(17,592)	(1,553,710)	64,672
Ending balance (in shares) at Mar. 31, 2020			218,483,000
Beginning balance at Dec. 31, 2019	$ 3,430,644	3,358,009	$ 2,165	4,854,042	4,546	(1,502,744)	72,635
Beginning balance (in shares) at Dec. 31, 2019	216,453,312		216,453,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	$ (23,672)
Ending balance at Sep. 30, 2020	$ 3,274,351	3,212,393	$ 2,186	4,914,767	(18,747)	(1,685,813)	61,958
Ending balance (in shares) at Sep. 30, 2020	218,566,057		218,566,000
Beginning balance at Mar. 31, 2020	$ 3,404,952	3,340,280	$ 2,185	4,909,397	(17,592)	(1,553,710)	64,672
Beginning balance (in shares) at Mar. 31, 2020			218,483,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of OP Units in HTALP	1,378						1,378
Share-based award transactions, net	2,100	2,100		2,100
Share-based award transactions, net (in shares)			1,000
Repurchase and cancellation of common stock	(174)	(174)		(174)
Repurchase and cancellation of common stock (in shares)			(7,000)
Redemption of noncontrolling interest and other	0	1,096		1,096			(1,096)
Redemption of noncontrolling interest and other (in shares)			40,000
Dividends declared	(69,989)	(68,827)				(68,827)
Dividends declared							(1,162)
Net income (loss)	13,725	13,489				13,489	236
Other comprehensive income (loss)	(3,228)	(3,176)			(3,176)		(52)
Ending balance at Jun. 30, 2020	3,348,764	3,284,788	$ 2,185	4,912,419	(20,768)	(1,609,048)	63,976
Ending balance (in shares) at Jun. 30, 2020			218,515,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based award transactions, net	1,832	1,832	$ 1	1,831
Share-based award transactions, net (in shares)			(28,000)
Repurchase and cancellation of common stock	(296)	(296)		(296)
Repurchase and cancellation of common stock (in shares)			(11,000)
Redemption of noncontrolling interest and other	0	813		813			(813)
Redemption of noncontrolling interest and other (in shares)			34,000
Dividends declared	(71,071)	(69,938)				(69,938)
Dividends declared							(1,133)
Net income (loss)	(6,932)	(6,827)				(6,827)	(105)
Other comprehensive income (loss)	2,054	2,021			2,021		33
Ending balance at Sep. 30, 2020	$ 3,274,351	$ 3,212,393	$ 2,186	$ 4,914,767	$ (18,747)	$ (1,685,813)	$ 61,958
Ending balance (in shares) at Sep. 30, 2020	218,566,057		218,566,000