Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Pension	$ 11,505	$ 8,803
Tax loss carryforwards	10,970	11,067
Inventory valuation	8,015	10,660
Other postretirement/postemployment costs	7,715	7,741
Accrued compensation	7,430	9,775
Goodwill	8,981	14,960
Lease obligation	8,493	9,790
Other	17,310	16,609
Valuation allowance	(6,456)	(3,869)
Total deferred tax assets	73,963	85,536
Deferred tax liabilities:
Depreciation and amortization	(81,409)	(94,286)
Goodwill	(9,899)	(9,909)
Swedish tax incentive	(7,196)	(8,531)
Right of use liability	(8,456)	(9,826)
Other	(11,537)	(7,712)
Total deferred tax liabilities	118,497	130,264
Non-current deferred tax assets	18,028	21,976
Non-current deferred tax liabilities	(62,562)	(66,704)
Net deferred tax liabilities	$ (44,534)	$ (44,728)