Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Series D Units	Redemption of units for stock Series B Units	Redemption of units for stock Series D Units	Redemption of units for cash	Redemption of units for cash Series B Units	Preferred Operating Partnership	Preferred Operating Partnership Series D Units	Preferred Operating Partnership Redemption of units for stock Series B Units	Preferred Operating Partnership Redemption of units for stock Series D Units	Preferred Operating Partnership Redemption of units for cash Series B Units	Operating Partnership	Operating Partnership Redemption of units for stock	Operating Partnership Redemption of units for cash	Other	Common Stock	Common Stock Redemption of units for stock	Common Stock Redemption of units for stock Series B Units	Common Stock Redemption of units for stock Series D Units	Additional Paid-in Capital	Additional Paid-in Capital Redemption of units for stock	Additional Paid-in Capital Redemption of units for stock Series B Units	Additional Paid-in Capital Redemption of units for stock Series D Units	Additional Paid-in Capital Redemption of units for cash	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2018	$ 2,785,422						$ 153,096					$ 218,362			$ 240	$ 1,271				$ 2,640,705					$ 34,650	$ (262,902)
Beginning balance (in shares) at Dec. 31, 2018																127,103,750
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon the exercise of options	$ 3,063															$ 3				3,060
Issuance of common stock upon the exercise of options (in shares)	211,057															211,057
Restricted stock grants issued	$ 2															$ 2
Restricted stock grants issued (in shares)																109,081
Restricted stock grants cancelled (in shares)																(8,863)
Issuance of common stock, net of offering costs	198,827															$ 19				198,808
Issuance of common stock, net of offering costs (in shares)																1,779,200
Compensation expense related to stock-based awards	13,051																			13,051
Repayment of receivable for preferred operating units pledged as collateral on loan	1,211											1,211
Issuance of Operating Partnership units in conjunction with acquisitions	28,022						28,022
Redemption of noncontrolling interests	0												$ (13,057)								$ 13,057
Redemption of noncontrolling interests (in shares)																	340,182
Conversion of Preferred C Units in the Operating Partnership for Common Operating Partnership Units	0						(4,374)					4,374
Noncontrolling interest in consolidated joint venture	173														173
Net income	451,123						12,492					18,711			(47)											419,967
Other comprehensive income (loss)	(66,843)						(407)					(2,820)													(63,616)
Distributions to Operating Partnership units held by noncontrolling interests	(34,243)						(12,881)					(21,362)
Dividends paid on common stock	(458,114)																									(458,114)
Ending balance at Dec. 31, 2019	2,921,694						175,948					205,419			366	$ 1,295				2,868,681					(28,966)	(301,049)
Ending balance (in shares) at Dec. 31, 2019																129,534,407
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon the exercise of options	$ 4,759															$ 1				4,758
Issuance of common stock upon the exercise of options (in shares)	134,930															134,930
Issuance of common stock in connection with share based compensation	$ 16,281															$ 1				16,280
Issuance of common stock in connection with share based compensation (in shares)																143,187
Restricted stock grants cancelled (in shares)																(5,083)
Issuance of common stock, net of offering costs	103,468															$ 9				103,459
Issuance of common stock, net of offering costs (in shares)																899,048
Buyback of common stock, net of offering costs	$ (67,873)															$ (8)										(67,865)
Buyback of common stock, net of offering costs (in shares)	(826,797)															(826,797)
Repayment of receivable for preferred operating units pledged as collateral on loan	$ 16,213											16,213
Redemption of noncontrolling interests	0			$ 0		$ (1,000)				$ (2,724)	$ (1,000)		(4,572)				$ 1		$ 1		4,571		$ 2,723
Redemption of noncontrolling interests (in shares)																	123,993		30,495
Repurchase of equity portion of 2015 exchangeable senior notes	0																$ 14				(14)
Repurchase of equity portion of 2015 exchangeable senior notes (in shares)																	1,323,781
Noncontrolling interest in consolidated joint venture	66														66
Net income	517,582						12,882					22,952			(31)											481,779
Other comprehensive income (loss)	(73,686)						(456)					(3,103)													(70,127)
Distributions to Operating Partnership units held by noncontrolling interests	(33,615)						(12,598)					(21,017)
Dividends paid on common stock	(467,765)																									(467,765)
Ending balance at Dec. 31, 2020	$ 2,936,124						172,052					215,892			401	$ 1,314				3,000,458					(99,093)	(354,900)
Ending balance (in shares) at Dec. 31, 2020	131,357,961															131,357,961
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon the exercise of options	$ 4,572															$ 0				4,572
Issuance of common stock upon the exercise of options (in shares)	62,322															62,322
Issuance of common stock in connection with share based compensation	$ 17,303															$ 0				17,303
Issuance of common stock in connection with share based compensation (in shares)																148,228
Restricted stock grants cancelled (in shares)																(12,808)
Issuance of common stock, net of offering costs	$ 273,189															$ 22				273,167
Issuance of common stock, net of offering costs (in shares)																2,185,685
Buyback of common stock, net of offering costs (in shares)	0
Redemption of noncontrolling interests	$ 0		$ 0		$ (788)				$ (2,834)				$ (6,373)	$ (173)			$ 2	$ 1			$ 6,371	$ 2,833		$ (615)
Repayment of receivable with Operating Partnership units pledged as collateral	411											411
Increase from acquisitions	188,319	$ 88,074						$ 88,074				188,319
Purchase of remaining equity interest in existing consolidated joint venture	(18,141)																			(18,141)
Redemption of noncontrolling interests (in shares)																	165,652	15,265
Noncontrolling interest in consolidated joint venture	(82)														(82)
Net income	877,758						14,697					35,414			(2)											827,649
Other comprehensive income (loss)	59,325						366					2,412													56,547
Distributions to Operating Partnership units held by noncontrolling interests	(39,094)						(13,245)					(25,849)
Dividends paid on common stock	(600,994)																									(600,994)
Ending balance at Dec. 31, 2021	$ 3,785,976						$ 259,110					$ 410,053			$ 317	$ 1,339				$ 3,285,948					$ (42,546)	$ (128,245)
Ending balance (in shares) at Dec. 31, 2021	133,922,305															133,922,305