Consolidated Statement of Equity (Unaudited) - USD ($) $ in Thousands	Total	Interest Expense	Early Extinguishment of Debt	Common Shares	Additional Paid-in Capital	Accumulated Dividends in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Interest Expense	Accumulated Other Comprehensive Income (Loss) Early Extinguishment of Debt	Noncontrolling Interests - Unitholders in the Operating Partnership	Noncontrolling Interests - Unitholders in the Operating Partnership Interest Expense	Noncontrolling Interests - Unitholders in the Operating Partnership Early Extinguishment of Debt
Beginning Balance (shares) at Dec. 31, 2020				60,476,292
Beginning Balance at Dec. 31, 2020	$ 1,253,406			$ 605	$ 1,445,644	$ (176,560)	$ 1,753			$ (18,036)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,733					1,394				339
Forfeiture of restricted stock (shares)				(4,006)
Dividends declared and paid	(21,463)					(16,932)				(4,531)
Stock-based compensation	1,484				1,484
Other comprehensive income - change in value of interest rate swaps	747						579			168
Reclassification of amortization of forward-starting swap realized gain		$ (275)	$ (193)					$ (216)	$ (152)		$ (59)	$ (41)
Ending Balance (shares) at Mar. 31, 2021				60,472,286
Ending Balance at Mar. 31, 2021	1,235,439			$ 605	1,447,128	(192,098)	1,964			(22,160)
Beginning Balance (shares) at Dec. 31, 2020				60,476,292
Beginning Balance at Dec. 31, 2020	1,253,406			$ 605	1,445,644	(176,560)	1,753			(18,036)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,220
Other comprehensive income - change in value of interest rate swaps	1,222
Reclassification of amortization of forward-starting swap realized gain		(550)	(193)
Ending Balance (shares) at Jun. 30, 2021				60,474,866
Ending Balance at Jun. 30, 2021	1,227,146			$ 605	1,448,612	(199,955)	2,122			(24,238)
Beginning Balance (shares) at Mar. 31, 2021				60,472,286
Beginning Balance at Mar. 31, 2021	1,235,439			$ 605	1,447,128	(192,098)	1,964			(22,160)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,487					9,076				2,411
Issuance of restricted stock (shares)				5,184
Forfeiture of restricted stock (shares)				(2,604)
Dividends declared and paid	(21,464)					(16,933)				(4,531)
Stock-based compensation	1,484				1,484
Other comprehensive income - change in value of interest rate swaps	475						374			101
Reclassification of amortization of forward-starting swap realized gain	(275)	(275)	0				(216)			(59)
Ending Balance (shares) at Jun. 30, 2021				60,474,866
Ending Balance at Jun. 30, 2021	$ 1,227,146			$ 605	1,448,612	(199,955)	2,122			(24,238)
Beginning Balance (shares) at Dec. 31, 2021	60,525,580			60,525,580
Beginning Balance at Dec. 31, 2021	$ 1,210,123			$ 605	1,453,272	(217,785)	2,872			(28,841)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,514					10,678				2,836
Forfeiture of restricted stock (shares)				(3,121)
Dividends declared and paid	(24,545)					(19,367)				(5,178)
Stock-based compensation	1,489				1,489
Shares withheld for employee taxes (shares)				(416)
Shares withheld for employee taxes	(15)				(15)
Other comprehensive income - change in value of interest rate swaps	5,596						4,408			1,188
Reclassification of amortization of forward-starting swap realized gain		(275)						(217)			(58)
Ending Balance (shares) at Mar. 31, 2022				60,522,043
Ending Balance at Mar. 31, 2022	$ 1,205,887			$ 605	1,454,746	(226,474)	7,063			(30,053)
Beginning Balance (shares) at Dec. 31, 2021	60,525,580			60,525,580
Beginning Balance at Dec. 31, 2021	$ 1,210,123			$ 605	1,453,272	(217,785)	2,872			(28,841)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,102
Other comprehensive income - change in value of interest rate swaps	$ 8,910
Reclassification of amortization of forward-starting swap realized gain		(550)	0
Ending Balance (shares) at Jun. 30, 2022	60,528,115			60,528,115
Ending Balance at Jun. 30, 2022	$ 1,199,968			$ 605	1,456,747	(235,107)	9,457			(31,734)
Beginning Balance (shares) at Mar. 31, 2022				60,522,043
Beginning Balance at Mar. 31, 2022	1,205,887			$ 605	1,454,746	(226,474)	7,063			(30,053)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,588					10,736				2,852
Issuance of restricted stock (shares)				6,072
Dividends declared and paid	(24,547)					(19,369)				(5,178)
Stock-based compensation	2,001				2,001
Other comprehensive income - change in value of interest rate swaps	$ 3,314						2,610			704
Reclassification of amortization of forward-starting swap realized gain		$ (275)	$ 0					$ (216)			$ (59)
Ending Balance (shares) at Jun. 30, 2022	60,528,115			60,528,115
Ending Balance at Jun. 30, 2022	$ 1,199,968			$ 605	$ 1,456,747	$ (235,107)	$ 9,457			$ (31,734)