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)
Dividends declared and paid (noncontrolling interest)										(4,531)
Stock-based compensation	1,484				1,484
Other comprehensive gain - 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, 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)
Dividends declared and paid (noncontrolling interest)										(5,178)
Stock-based compensation	1,489				1,489
Shares withheld for employee taxes (shares)				(416)
Shares withheld for employee taxes	(15)			$ 0	(15)
Other comprehensive gain - change in value of interest rate swaps	$ 5,596						4,408			1,188
Reclassification of amortization of forward-starting swap realized gain		$ (275)	$ 0					$ (217)			$ (58)
Ending Balance (shares) at Mar. 31, 2022	60,522,043			60,522,043
Ending Balance at Mar. 31, 2022	$ 1,205,887			$ 605	$ 1,454,746	$ (226,474)	$ 7,063			$ (30,053)