Other Comprehensive Income (Loss) - Components And Allocated Tax Effects Of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Before-Tax	$ (6,606)			$ 10,219			$ (11,461)	$ (6,109)
Tax Expense (Benefit)	(1,413)			2,342			(2,459)	(1,437)
Other comprehensive income (loss)	(5,193)	$ 4,995	$ (8,804)	7,877	$ 14,374	$ (26,923)	(9,002)	(4,672)
Net change in foreign currency translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Before-Tax	(6,636)			7,727			(10,411)	(2,149)
Tax Expense (Benefit)	(1,417)			1,705			(2,192)	(434)
Other comprehensive income (loss)	(5,219)			6,022			(8,219)	(1,715)
Net unrealized gain on hedging instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Before-Tax	960			2,492			1,742	(3,918)
Tax Expense (Benefit)	237			636			431	(1,000)
Other comprehensive income (loss)	723			1,856			1,311	(2,918)
Net change in pension and other post-retirement benefit obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Before-Tax	(930)			0			(2,792)	(42)
Tax Expense (Benefit)	(233)			1			(698)	(3)
Other comprehensive income (loss)	$ (697)			$ (1)			$ (2,094)	$ (39)