Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 53,986	$ 24,154
Accounts receivable, net	101,292	87,659
Contract assets	116,168	113,182
Inventories	186,495	176,468
Income tax refunds receivable	1,321	13,981
Other current assets	22,975	16,114
Total current assets	482,237	431,558
Property, plant and equipment, net of accumulated depreciation of $274,458 and $268,089, respectively	203,266	201,606
Operating Lease, Right-of-Use Asset	6,618	7,391
Goodwill	382,504	379,854
Other intangible assets, net	365,427	372,331
Deferred income taxes	47,818	47,385
Other assets	50,788	51,207
Total assets	1,538,658	1,491,332
Current liabilities:
Accounts payable – trade	47,194	48,277
Accrued salaries and wages	26,258	31,395
Contract liabilities, current portion	6,044	4,081
Operating Lease, Liability, Current	3,121	3,332
Income taxes payable	170	393
Other current liabilities	44,210	39,097
Total current liabilities	126,997	126,575
Long-term debt, excluding current portion, net of debt issuance costs	609,325	561,061
Deferred income taxes	6,365	6,079
Underfunded pension	51,459	52,309
Contract liabilities, noncurrent portion	20,329	20,515
Operating Lease, Liability, Noncurrent	3,905	4,534
Other Liabilities, Noncurrent	36,322	36,280
Commitments and contingencies (Note 12)
Shareholders' equity:
Preferred stock, $1 par value, 200,000 shares authorized; none outstanding	0	0
Common stock, $1 par value, 50,000,000 shares authorized; voting; 30,766,419 and 30,640,068 shares issued, respectively	30,766	30,640
Additional paid-in capital	247,812	245,436
Retained earnings	682,812	688,457
Accumulated other comprehensive income (loss)	$ (154,793)	$ (158,421)
Treasury Stock, Common, Shares	2,632,334	2,607,841
Less 2,632,334 and 2,607,841 shares of common stock, respectively, held in treasury, at cost	$ (122,641)	$ (122,133)
Total shareholders’ equity	683,956	683,979
Total liabilities and shareholders’ equity	$ 1,538,658	$ 1,491,332