CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 193,724	$ 235,850
Accounts receivable, less allowance for credit losses of $1,099 and $1,007	174,620	177,413
Contract assets	46,746	38,853
Inventories	177,089	182,402
Prepaid income taxes	3,908	4,042
Asbestos-related insurance receivables, current portion	3,881	3,881
Other current assets	11,913	17,426
Total current assets	611,881	659,867
Property, plant and equipment, net of accumulated depreciation of $392,217 and $381,584	361,527	358,415
Investments in unconsolidated joint ventures	12,841	14,082
Deferred income taxes	57,991	50,649
Goodwill	355,867	352,365
Other intangible assets, net of amortization	132,233	133,724
Pension assets	5,342	5,251
Asbestos-related insurance receivables, non-current portion	55,926	55,926
Other long-term assets	17,919	15,935
Total assets	1,611,527	1,646,214
Current liabilities
Accounts payable	52,156	57,342
Accrued employee benefits and compensation	37,207	34,158
Accrued income taxes payable	4,553	5,504
Asbestos-related liabilities, current portion	4,968	4,968
Finance lease obligations, current portion	380	498
Other accrued liabilities	28,214	40,067
Total current liabilities	127,478	142,537
Borrowings under revolving credit facility	190,000	215,000
Pension and other postretirement benefits liabilities	1,540	1,501
Asbestos-related liabilities, non-current portion	59,996	60,065
Finance lease obligations, non-current portion	1,323	1,295
Non-current income tax	9,204	9,985
Deferred income taxes	24,026	23,557
Other long-term liabilities	19,702	19,808
Commitments and contingencies (Note 10 and Note 12)
Shareholders’ equity
Capital stock - $1 par value; 50,000 authorized shares; 18,609 and 18,574 shares issued and outstanding	18,609	18,574
Additional paid-in capital	140,214	140,702
Retained earnings	1,094,949	1,098,454
Accumulated other comprehensive loss	(75,514)	(85,264)
Total shareholders' equity	1,178,258	1,172,466
Total liabilities and shareholders' equity	$ 1,611,527	$ 1,646,214
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other long-term assets	Other long-term assets
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities