Other Comprehensive Income (Loss) - After-tax Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 134,401	$ 102,615	$ 126,653	$ 95,370
Net current period change	(4,688)	1,798	(1,576)	(414)
Ending balance	133,454	111,637	133,454	111,637
Foreign currency translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(20,445)	(19,024)
Net current period change			(5,196)	(584)
Ending balance	(25,641)	(19,608)	(25,641)	(19,608)
Pension and post-retirement benefits plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(22,750)	(27,423)
Amortization of actuarial gain			1,447	673
Ending balance	(21,303)	(26,750)	(21,303)	(26,750)
Derivative instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			757	1,441
Net current period change			2,173	(503)
Ending balance	2,930	938	2,930	938
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(39,326)	(47,218)	(42,438)	(45,006)
Net current period change			(5,196)	(584)
Ending balance	$ (44,014)	$ (45,420)	$ (44,014)	$ (45,420)