Segment Reporting - Reconciliation of Segment Profit to Net Income Attributable to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting [Abstract]
Total profit from all segments	$ 138,639	$ 158,514	$ 310,969	$ 311,696
General and administrative expenses	(9,863)	(9,159)	(20,198)	(18,991)
Depreciation and amortization	(98,765)	(78,724)	(196,542)	(158,597)
Other income	325	2,892	2,314	5,790
Other expenses	(478)	(1,807)	(1,874)	(3,652)
(Loss) income from unconsolidated Funds	(140)	2,207	183	3,758
Interest expense	(35,190)	(34,063)	(70,610)	(67,356)
Net (loss) income	(5,472)	39,860	24,242	72,648
Less: Net loss (income) attributable to noncontrolling interests	7,502	(5,894)	4,711	(9,981)
Net income attributable to common stockholders	$ 2,030	$ 33,966	$ 28,953	$ 62,667