CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ (16,846)		$ (8,590)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	36,920		33,039
Amortization	8,174		7,965
Deferred income tax (benefit) expense	3,445		(56)
Equity (income) loss of unconsolidated entities, net	249		133
Remeasurement of long-lived assets	10,695	$ 10,700	0
Other, net	772		1,009
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	24,426		(14,533)
Inventories	(5,297)		(8,534)
Contract assets	(9,199)		11,698
Right-of-use assets	8,599		7,842
Accounts payable	(13,751)		17,735
Accrued interest payable	(6,820)		(6,998)
Accrued compensation	(25,531)		7,343
Advances on contracts	(1,618)		(5,591)
Operating lease liabilities	(8,212)		(7,202)
Retirement plan liabilities, net	(340)		814
Other assets and liabilities	(4,318)		838
Net cash (used) provided by operating activities	1,348		36,912
Cash flows from investing activities:
Purchases of property, plant and equipment	(26,881)		(22,146)
Proceeds from sales of assets	4,313		823
Expenditures for intangible assets	(77)		(36)
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	(602)		(1,212)
Other investing activities, net	1		32
Net cash used by investing activities	(23,246)		(22,539)
Cash flows from financing activities:
Short-term borrowings, net	(9,003)		(3,029)
Current maturities and long-term debt:
Additions	35,323		59,000
Reductions	(4,967)		(57,200)
Dividends paid to noncontrolling interests	(8,243)		0
Contributions from noncontrolling interests	874		0
Stock-based compensation - Employee taxes paid	(1,040)		(930)
Other financing activities, net	(1)		0
Net cash (used) provided by financing activities	12,943		(2,159)
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(8,251)		(1,072)
Net increase (decrease) in cash and cash equivalents, including restricted cash	(17,206)		11,142
Cash and cash equivalents, including restricted cash, at beginning of period	124,614		85,094
Cash and cash equivalents, including restricted cash, at end of period	107,408	$ 124,614	96,236
Supplementary cash flow information:
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ 120		$ 7,524