Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In  Capital	Accumulated Other Comprehensive Income  (Loss)	Retained Earnings (Accumulated Deficit and Distributions in Excess of Retained Earnings)	Total Shareholders’ Equity	Operating Partnership	Joint Venture
Balance at beginning of year at Dec. 31, 2017	$ 1,277,376	$ 128	$ 1,043	$ 1,262,679	$ 1,451	$ 9,201	$ 1,274,502	$ 2,874	$ 0
Balance at beginning of year (in shares) at Dec. 31, 2017		12,800,000	104,287,128
Changes in equity
Redemption of preferred stock (in shares)		(3,400,000)
Redemption of preferred stock	(85,000)	$ (34)		(81,689)		(3,277)	(85,000)
Common stock redemption of common units (in shares)			64,126
Common stock redemption of common units	0		$ 1	576			577	(577)
Dividends	(92,225)					(92,007)	(92,007)	(218)
Equity-based compensation (in shares)			619,775
Equity-based compensation	6,665		$ 6	6,640			6,646	19
Shares acquired for employee withholding requirements (in shares)			(187,850)
Shares acquired for employee withholding requirements	(2,724)		$ (2)	(2,722)			(2,724)
Other	(174)			(174)			(174)
Other comprehensive income (loss)	(2,900)				(2,892)		(2,892)	(8)
Net (loss) income	91,126					90,921	90,921	205
Balance at end of year at Dec. 31, 2018	$ 1,192,144	$ 94	$ 1,048	1,185,310	(1,441)	4,838	1,189,849	2,295	0
Balance at end of year (in shares) at Dec. 31, 2018		9,400,000	104,783,179
Changes in equity
Common stock redemption of common units (in shares)	50,244		50,244
Common stock redemption of common units	$ 0		$ 1	475	(31)		445	(445)
Dividends	(90,399)					(89,731)	(89,731)	(178)	(490)
Equity-based compensation (in shares)			410,432
Equity-based compensation	$ 6,219		$ 4	6,201			6,205	14
Shares acquired for employee withholding requirements (in shares)	(74,340)		(74,340)
Shares acquired for employee withholding requirements	$ (839)		$ (1)	(838)			(839)
Other	(199)			(199)			(199)
Other comprehensive income (loss)	(14,596)				(14,562)		(14,562)	(34)
Net (loss) income	82,348					82,610	82,610	157	(419)
Contribution by non-controlling interest in joint venture	68,712								68,712
Balance at end of year at Dec. 31, 2019	$ 1,243,390	$ 94	$ 1,052	1,190,949	(16,034)	(2,283)	1,173,778	1,809	67,803
Balance at end of year (in shares) at Dec. 31, 2019		9,400,000	105,169,515
Changes in equity
Common stock redemption of common units (in shares)	47,279		47,279
Common stock redemption of common units	$ 0			410	(34)		376	(376)
Dividends	(34,008)					(33,391)	(33,391)	(37)	(580)
Equity-based compensation (in shares)			557,338
Equity-based compensation	$ 6,476		$ 6	6,459			6,465	11
Shares acquired for employee withholding requirements (in shares)	(65,345)		(65,345)
Shares acquired for employee withholding requirements	$ (469)		$ (1)	(468)			(469)
Other	(30)			(30)			(30)
Other comprehensive income (loss)	(14,673)				(14,648)		(14,648)	(25)
Net (loss) income	(149,245)					(143,339)	(143,339)	(271)	(5,635)
Contribution by non-controlling interest in joint venture	622								622
Balance at end of year at Dec. 31, 2020	$ 1,052,063	$ 94	$ 1,057	$ 1,197,320	$ (30,716)	$ (179,013)	$ 988,742	$ 1,111	$ 62,210
Balance at end of year (in shares) at Dec. 31, 2020		9,400,000	105,708,787