Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4,411	$ (19,618)	$ 1,220	$ (11,330)
Other comprehensive income (loss):
Unrealized gain (loss) on valuation of interest rate swap agreements	(95)	(1,709)	(36)	(19,404)
Less: amount reclassified into interest expense	2,898	2,317	5,767	3,113
Other comprehensive income (loss)	2,803	608	5,731	(16,291)
Comprehensive income (loss)	7,214	(19,010)	6,951	(27,621)
Net (income) loss attributable to non-controlling interests and private perpetual preferred unitholders	(2,336)	6,825	(1,766)	3,032
Other comprehensive (income) loss attributable to non-controlling interests	(1,064)	(231)	(2,178)	6,174
Comprehensive income (loss) attributable to common stockholders	$ 3,814	$ (12,416)	$ 3,007	$ (18,415)