Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 2,133,409
Ending balance	1,383,566	$ 2,133,409
Interest rate cap agreements
Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,433)	(8,961)	$ (12,408)
Unrealized (losses) gains	(21,781)	1,566	(181)
Related income tax	5,435	(415)	48
Unrealized (losses) gains net	(16,346)	1,151	(133)
Reclassification from accumulated other comprehensive losses (income) into net income	7,081	8,591	8,466
Related income tax	(1,768)	(2,214)	(2,180)
Reclassification from accumulated other comprehensive income into net income net of tax	5,313	6,377	6,286
Ending balance	(12,466)	(1,433)	(8,961)
Interest rate cap agreements \| Cumulative Effect, Period of Adoption, Adjustment
Comprehensive Income (Loss) [Line Items]
Cumulative effect of change in accounting principle				$ (2,706)
Investment securities
Comprehensive Income (Loss) [Line Items]
Beginning balance	0	0	5,662
Unrealized (losses) gains	0	0	0
Related income tax	0	0	0
Unrealized (losses) gains net	0	0	0
Reclassification from accumulated other comprehensive losses (income) into net income	0	0	0
Related income tax	0	0	0
Reclassification from accumulated other comprehensive income into net income net of tax	0	0	0
Ending balance	0	0	0
Investment securities \| Cumulative Effect, Period of Adoption, Adjustment
Comprehensive Income (Loss) [Line Items]
Cumulative effect of change in accounting principle				(5,662)
Foreign currency translation adjustments
Comprehensive Income (Loss) [Line Items]
Beginning balance	(46,065)	(25,963)	19,981
Unrealized (losses) gains	(7,080)	(20,102)	(45,944)
Related income tax	(543)	0	0
Unrealized (losses) gains net	(7,623)	(20,102)	(45,944)
Reclassification from accumulated other comprehensive losses (income) into net income	0	0	0
Related income tax	0	0	0
Reclassification from accumulated other comprehensive income into net income net of tax	0	0	0
Ending balance	(53,688)	(46,065)	(25,963)
Foreign currency translation adjustments \| Cumulative Effect, Period of Adoption, Adjustment
Comprehensive Income (Loss) [Line Items]
Cumulative effect of change in accounting principle				0
Accumulated other comprehensive (loss) income
Comprehensive Income (Loss) [Line Items]
Beginning balance	(47,498)	(34,924)	13,235
Unrealized (losses) gains	(28,861)	(18,536)	(46,125)
Related income tax	4,892	(415)	48
Unrealized (losses) gains net	(23,969)	(18,951)	(46,077)
Reclassification from accumulated other comprehensive losses (income) into net income	7,081	8,591	8,466
Related income tax	(1,768)	(2,214)	(2,180)
Reclassification from accumulated other comprehensive income into net income net of tax	5,313	6,377	6,286
Ending balance	$ (66,154)	$ (47,498)	$ (34,924)
Accumulated other comprehensive (loss) income \| Cumulative Effect, Period of Adoption, Adjustment
Comprehensive Income (Loss) [Line Items]
Cumulative effect of change in accounting principle				$ (8,368)

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