Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Pension and other postretirement costs	$ 3,580	$ 4,296
Inventories	2,659	2,327
Net operating/capital loss and interest carryforwards	13,562	13,082
Tax credit carryforwards	3,026	1,994
Deferred compensation	3,267	2,930
Other accruals and reserves	4,425	3,420
Book over tax depreciation		93
Total gross deferred tax assets	30,519	28,142
Less: valuation allowance	(16,486)	(16,946)
Deferred tax assets, net of valuation allowance	14,033	11,196
Deferred tax liabilities:
Tax over book depreciation	(780)	0
Investment in subsidiary	(1,958)	(1,927)
Intangible assets, including tax deductible goodwill	(11,106)	(5,657)
Total gross deferred tax liabilities	(13,844)	(7,584)
Net deferred tax assets	$ 189	$ 3,612