CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect in Period of Adoption	Total Stockholders’ Equity	Total Stockholders’ Equity Cumulative Effect in Period of Adoption	Common Stock	Additional Paid-in Capital	Cumulative Distributions in Excess of Net Income	Cumulative Distributions in Excess of Net Income Cumulative Effect in Period of Adoption	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2018					178,306,528
Beginning balance at Dec. 31, 2018	$ 3,254,747	$ (32,502)	$ 3,250,414		$ 1,783	$ 3,507,925	$ (271,595)	$ (32,502)	$ 12,301	$ 4,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,991		5,973				5,973			18
Other comprehensive income (loss)	(23,237)		(23,237)						(23,237)
Distributions to noncontrolling interest	(73)									(73)
Amortization of stock-based compensation	6,544		6,544			6,544
Common stock issuance, net (in shares)					11,208,496
Common stock issuance, net	211,614		211,614		$ 112	211,502
Common dividends	(162,708)		(162,708)				(162,708)
Ending balance (in shares) at Jun. 30, 2019					189,515,024
Ending balance at Jun. 30, 2019	3,260,376		3,256,098		$ 1,895	3,725,971	(460,832)		(10,936)	4,278
Beginning balance (in shares) at Dec. 31, 2018					178,306,528
Beginning balance at Dec. 31, 2018	3,254,747	(32,502)	3,250,414		$ 1,783	3,507,925	(271,595)	(32,502)	12,301	4,333
Ending balance (in shares) at Dec. 31, 2019					205,208,018
Ending balance at Dec. 31, 2019	$ 3,488,460	(167)	3,488,460	$ (167)	$ 2,052	4,072,079	(573,283)	(167)	(12,388)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU adoptions	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Mar. 31, 2019					178,419,599
Beginning balance at Mar. 31, 2019	$ 3,050,778		3,046,469		$ 1,784	3,508,987	(462,555)		(1,747)	4,309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,683		83,677				83,677			6
Other comprehensive income (loss)	(9,189)		(9,189)						(9,189)
Distributions to noncontrolling interest	(37)									(37)
Amortization of stock-based compensation	3,274		3,274			3,274
Common stock issuance, net (in shares)					11,095,425
Common stock issuance, net	213,821		213,821		$ 111	213,710
Common dividends	(81,954)		(81,954)				(81,954)
Ending balance (in shares) at Jun. 30, 2019					189,515,024
Ending balance at Jun. 30, 2019	3,260,376		3,256,098		$ 1,895	3,725,971	(460,832)		(10,936)	4,278
Beginning balance (in shares) at Dec. 31, 2019					205,208,018
Beginning balance at Dec. 31, 2019	3,488,460	$ (167)	3,488,460	$ (167)	$ 2,052	4,072,079	(573,283)	$ (167)	(12,388)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	64,840		64,840				64,840
Other comprehensive income (loss)	(43,253)		(43,253)						(43,253)
Amortization of stock-based compensation	5,957		5,957			5,957
Common stock issuance, net (in shares)					352,662
Common stock issuance, net	705		705		$ 4	701
Common dividends	(155,291)		(155,291)				(155,291)
Ending balance (in shares) at Jun. 30, 2020					205,560,680
Ending balance at Jun. 30, 2020	3,361,251		3,361,251		$ 2,056	4,078,737	(663,901)		(55,641)	0
Beginning balance (in shares) at Mar. 31, 2020					205,559,356
Beginning balance at Mar. 31, 2020	3,395,213		3,395,213		$ 2,056	4,075,781	(631,251)		(51,373)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,623		29,623				29,623
Other comprehensive income (loss)	(4,268)		(4,268)						(4,268)
Amortization of stock-based compensation	2,969		2,969			2,969
Common stock issuance, net (in shares)					1,324
Common stock issuance, net	(13)		(13)			(13)
Common dividends	(62,273)		(62,273)				(62,273)
Ending balance (in shares) at Jun. 30, 2020					205,560,680
Ending balance at Jun. 30, 2020	$ 3,361,251		$ 3,361,251		$ 2,056	$ 4,078,737	$ (663,901)		$ (55,641)	$ 0