Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (12,269)	$ 26,784	$ (23,599)	$ 55,570
Other comprehensive income (loss):
Unrealized gain (loss) on valuation of interest rate swap agreements	64	(6,256)	(19,340)	(25,992)
Less: amount reclassified into interest expense	2,873	319	5,986	637
Other comprehensive income (loss)	2,937	(5,937)	(13,354)	(25,355)
Comprehensive income (loss)	(9,332)	20,847	(36,953)	30,215
Net income attributable to non-controlling interests and private perpetual preferred unitholders	4,065	(10,902)	7,097	(22,924)
Other comprehensive (income) loss attributable to non-controlling interests	(1,060)	2,347	5,114	10,269
Comprehensive income (loss) attributable to common stockholders	$ (6,327)	$ 12,292	$ (24,742)	$ 17,560