Organization, Basis of Presentation and Summary of Significant Accounting Policies - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental disclosure of cash activities:
Cash paid on gross receipts and income for federal and state purposes	$ 292	$ 324	$ 275
Interest paid	55,104	57,276	60,319
Other non-cash investing and financing activities increase (decrease):
Intangible lease liabilities	22,185	0	1,475
Interest rate swap asset	0	0	(4,931)
Interest rate swap liabilities	(6,064)	5,646	3,285
Accrued real estate improvement costs	7,122	5,346	3,222
Equity Redemption of OP Units	6,858	20,098	2,632
Disposition of real estate through issuance of mortgage note	0	0	13,250
Dividends and distributions payable	$ 24,219	$ 336	$ 399