Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (14,925)	$ (26,593)
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	3,427	(10)
Net hedging (gain) loss reclassified to net income	(414)	(1,123)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	0	538
Net defined benefit plan (gain) loss reclassified to net income	712	471
Total other comprehensive income (loss), before tax	(11,200)	(26,717)
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	(87)	1,148
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	(18)	292
Net hedging (gain) loss reclassified to net income	(467)	74
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	0	(4)
Net defined benefit plan (gain) loss reclassified to net income	(11)	(4)
Total other comprehensive income (loss) tax (provision) benefit	(583)	1,506
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(15,012)	(25,445)
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	3,409	282
Net hedging (gain) loss reclassified to net income	(881)	(1,049)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0	534
Net defined benefit plan (gain) loss reclassified to net income	701	467
Total other comprehensive income (loss), net of tax	(11,783)	(25,211)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(11,783)	(25,211)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(150,309)		$ (138,526)
OCI before reclassifications	(11,603)	(24,629)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications	(15,012)	(25,445)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications	3,409	282
Net Unrealized Gain (Loss) on Nonderivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,400)	(14,400)
OCI before reclassifications	0	0
Pension Benefit Obligation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications	$ 0	$ 534