Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 934,336
Other comprehensive income (loss) before reclassifications		(24,506)	$ 11,188	$ 2,912
Amounts reclassified from OCI		8,969	(7,271)	(365)
Ending balance		938,425	934,336
Accumulated Other Comprehensive (Loss) Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(159,091)	(163,008)	(165,555)
Ending balance		(174,628)	(159,091)	(163,008)
Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]	749	(199)	147
Other comprehensive income (loss) before reclassifications	[1]	775	(374)	(111)
Amounts reclassified from OCI	[1]	(1,318)	1,322	(235)
Ending balance	[1]	206	749	(199)
Pension Items [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]	(1,965)	(672)	549
Other comprehensive income (loss) before reclassifications	[1]	1,528	(1,325)	(1,091)
Amounts reclassified from OCI	[1]	84	32	(130)
Ending balance	[1]	(353)	(1,965)	(672)
Foreign Currency Items [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(157,875)	(162,137)	(166,251)
Other comprehensive income (loss) before reclassifications		(26,809)	12,887	4,114
Amounts reclassified from OCI		10,203	(8,625)	0
Ending balance		$ (174,481)	$ (157,875)	$ (162,137)

[1] Cash Flow Hedges and Pension Items are net of tax.