Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid in Capital	Distributions in Excess of Net Income	Accumulated Other Comprehensive Loss	Total Shareholders’ Equity	Noncontrolling Interests in Subsidiaries
Beginning balance (in shares) at Dec. 31, 2020		84,409
Beginning balance at Dec. 31, 2020	$ 1,321,109	$ 844	$ 1,649,366	$ (298,860)	$ (30,563)	$ 1,320,787	$ 322
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	23,180			23,180		23,180
Unrealized gain on interest rate hedges	2,805				2,805	2,805
Loss on interest rate derivatives	5,760				5,760	5,760
Amortization of swap settlements	1,530				1,530	1,530
Distributions to noncontrolling interests	(13)						(13)
Dividends	$ (65,372)			(65,372)		(65,372)
Equity issuances, net of issuance costs (in shares)	24	24
Equity issuances, net of issuance costs	$ 467		467			467
Shares issued under Dividend Reinvestment Program (in shares)	65	65
Shares issued under Dividend Reinvestment Program	$ 1,468		1,468			1,468
Share grants, net of forfeitures and tax withholdings (in shares)		130
Share grants, net of forfeitures and tax withholdings	5,522	$ 2	5,520			5,522
Ending balance (in shares) at Sep. 30, 2021		84,628
Ending balance at Sep. 30, 2021	1,296,456	$ 846	1,656,821	(341,052)	(20,468)	1,296,147	309
Beginning balance (in shares) at Jun. 30, 2021		84,590
Beginning balance at Jun. 30, 2021	1,276,435	$ 846	1,654,409	(357,934)	(21,200)	1,276,121	314
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	31,319			31,319		31,319
Unrealized gain on interest rate hedges	221				221	221
Amortization of swap settlements	511				511	511
Distributions to noncontrolling interests	(5)						(5)
Dividends	$ (14,437)			(14,437)		(14,437)
Shares issued under Dividend Reinvestment Program (in shares)	19	20
Shares issued under Dividend Reinvestment Program	$ 459		459			459
Share grants, net of forfeitures and tax withholdings (in shares)		18
Share grants, net of forfeitures and tax withholdings	1,953		1,953			1,953
Ending balance (in shares) at Sep. 30, 2021		84,628
Ending balance at Sep. 30, 2021	1,296,456	$ 846	1,656,821	(341,052)	(20,468)	1,296,147	309
Beginning balance (in shares) at Dec. 31, 2021		86,261
Beginning balance at Dec. 31, 2021	1,317,062	$ 863	1,697,477	(362,494)	(19,091)	1,316,755	307
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(27,337)			(27,337)		(27,337)
Unrealized gain on interest rate hedges	3,284				3,284	3,284
Amortization of swap settlements	1,529				1,529	1,529
Distributions to noncontrolling interests	(6)						(6)
Dividends	$ (44,708)			(44,708)		(44,708)
Equity issuances, net of issuance costs (in shares)	1,032	1,032
Equity issuances, net of issuance costs	$ 26,851	$ 10	26,841			26,851
Shares issued under Dividend Reinvestment Program (in shares)	32	32
Shares issued under Dividend Reinvestment Program	$ 777		777			777
Share grants, net of forfeitures and tax withholdings (in shares)		179
Share grants, net of forfeitures and tax withholdings	3,747	$ 2	3,745			3,747
Ending balance (in shares) at Sep. 30, 2022		87,504
Ending balance at Sep. 30, 2022	1,281,199	$ 875	1,728,840	(434,539)	(14,278)	1,280,898	301
Beginning balance (in shares) at Jun. 30, 2022		87,392
Beginning balance at Jun. 30, 2022	1,304,096	$ 874	1,727,031	(408,882)	(15,229)	1,303,794	302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(10,739)			(10,739)		(10,739)
Unrealized gain on interest rate hedges	442				442	442
Amortization of swap settlements	509				509	509
Distributions to noncontrolling interests	(1)						(1)
Dividends	$ (14,918)			(14,918)		(14,918)
Shares issued under Dividend Reinvestment Program (in shares)	12	12
Shares issued under Dividend Reinvestment Program	$ 259		259			259
Share grants, net of forfeitures and tax withholdings (in shares)		100
Share grants, net of forfeitures and tax withholdings	1,551		1,550			1,551
Ending balance (in shares) at Sep. 30, 2022		87,504
Ending balance at Sep. 30, 2022	$ 1,281,199	$ 875	$ 1,728,840	$ (434,539)	$ (14,278)	$ 1,280,898	$ 301