CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (8,590)	$ (38,680)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	33,039	33,604
Amortization	7,965	8,586
Deferred income tax (benefit) expense	(56)	(4,275)
Equity (income) loss of unconsolidated entities, net	133	131
Dividends from unconsolidated entities	0	178
Other, net	1,009	259
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	(14,533)	(15,364)
Income tax refunds receivable, reimbursable to seller	0	7,687
Inventories	(8,534)	(4,610)
Contract assets	11,698	4,843
Right-of-use assets	7,842	7,076
Accounts payable	17,735	1,655
Accrued interest payable	(6,998)	(7,393)
Accrued compensation	7,343	(5,692)
Advances on contracts	(5,591)	(7,808)
Operating lease liabilities	(7,202)	(7,063)
Retirement plan liabilities, net	814	(14,519)
Other assets and liabilities	838	7,070
Net cash provided (used) by operating activities	36,912	(34,315)
Cash flows from investing activities:
Purchases of property, plant and equipment	(22,146)	(32,958)
Proceeds from sales of assets	823	5,976
Expenditures for intangible assets	(36)	(54)
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	(1,212)	1,061
Payments for settlements of interest rate swaps	0	(1,062)
Other investing activities, net	32	124
Net cash used by investing activities	(22,539)	(26,913)
Cash flows from financing activities:
Short-term borrowings, net	(3,029)	2,051
Current maturities and long-term debt:
Additions	59,000	72,005
Reductions	(57,200)	(2,566)
Stock-based compensation - Employee taxes paid	(930)	(1,377)
Payment of contingent consideration	0	(6,915)
Net cash (used) provided by financing activities	(2,159)	63,198
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(1,072)	455
Net increase in cash and cash equivalents, including restricted cash	11,142	2,425
Cash and cash equivalents, including restricted cash, at beginning of period	85,094	87,128
Cash and cash equivalents, including restricted cash, at end of period	96,236	89,553
Supplementary cash flow information:
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ 7,524	$ (745)