Shareholders' Equity - Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 380,326	$ 376,772	$ 390,393
Other comprehensive (loss) income before reclassification	(43,413)	(12,684)	(37,213)
Amounts reclassified from accumulated other comprehensive loss, net	27,569	1,674	3,931
Other comprehensive loss	(15,844)	(11,010)	(33,282)
Balance at end of period	379,416	380,326	376,772
Accumulated Other Comprehensive Loss, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(77,887)	(66,877)	(33,595)
Balance at end of period	(93,731)	(77,887)	(66,877)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(59,143)	(66,312)	(24,374)
Other comprehensive (loss) income before reclassification	17,571	7,627	(41,938)
Amounts reclassified from accumulated other comprehensive loss, net	0	(458)	0
Other comprehensive loss	17,571	7,169	(41,938)
Balance at end of period	(41,572)	(59,143)	(66,312)
Deferred income tax expense (benefit)	(3,083)	(5,474)	(5,232)	$ (5,339)
Deferred tax expense (benefit) before reclassification	2,391	(242)	107
Reclassification from AOCI	(500)
Unrealized (Losses) Gains on Interest Rate Derivative and Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(565)	(9,221)
Other comprehensive (loss) income before reclassification			4,725
Amounts reclassified from accumulated other comprehensive loss, net			3,931
Other comprehensive loss			8,656
Balance at end of period			(565)
Deferred income tax expense (benefit)			19,112	$ 16,317
Deferred tax expense (benefit) before reclassification			1,525
Deferred tax expense, reclassification from AOCI			$ 1,270
Unrealized (Losses) Gains on Interest Rate Derivative and Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(18,744)
Other comprehensive (loss) income before reclassification	(60,984)	(20,311)
Amounts reclassified from accumulated other comprehensive loss, net	27,569	2,132
Other comprehensive loss	(33,415)	(18,179)
Balance at end of period	(52,159)	(18,744)
Deferred income tax expense (benefit)	3,823	14,273
Deferred tax expense (benefit) before reclassification	(19,072)	(5,407)
Deferred tax expense, reclassification from AOCI	$ 8,622	$ 568