Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Pension and other postretirement costs	$ 1,775	$ 3,580
Inventories	4,057	2,659
Net operating/capital loss and interest carryforwards	9,060	13,562
Tax credit carryforwards	2,372	3,026
Deferred compensation	2,921	3,267
Research and development costs	2,940	832
Other accruals and reserves	2,228	3,593
Total gross deferred tax assets	25,353	30,519
Less: valuation allowance	(10,726)	(16,486)
Deferred tax assets, net of valuation allowance	14,627	14,033
Deferred tax liabilities:
Tax over book depreciation	(1,453)	(780)
Investment in subsidiary	(2,137)	(1,958)
Intangible assets, including tax deductible goodwill	(10,675)	(11,106)
Total gross deferred tax liabilities	(14,265)	(13,844)
Net deferred tax assets	$ 362	$ 189