CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ (163,709)	$ (124,339)	$ (84,939)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation	153,382	148,329	138,956
Amortization	30,575	31,471	32,408
Deferred income tax (benefit) expense	(3,892)	(13,153)	6,443
Equity in (income) loss of unconsolidated entities, net	(155)	10	761
Dividends from unconsolidated entities	230	321	0
Goodwill and other intangible asset impairment charges	0	15,866	0
Remeasurement of long-lived assets	0	10,695	0
Gain (Loss) on Disposition of Business	0	(10,478)	0
Stock-based compensation	21,009	16,650	12,916
Other, net	(9,016)	(13,924)	(2,749)
Changes in assets and liabilities:
Accounts receivable	10,195	45,372	(38,654)
Inventories	8,129	(7,642)	(6,073)
Contract assets	31,551	(11,412)	3,475
Increase (Decrease) In Right-Of_Use Assets	31,350	31,546	32,479
Property, plant and equipment impairment charge	7,797	23,444	14,099
Accounts payable	7,158	(15,038)	(3,590)
Accrued interest payable	(297)	(413)	221
Accrued compensation	312	(12,477)	33,871
Advances on contracts	(16,714)	(13,210)	(14,160)
Operating lease liabilities	(31,121)	(30,945)	(31,290)
Retirement plan liabilities, net	18,704	(5,262)	(3,216)
Other assets and liabilities	5,919	12,652	23,490
Net cash provided (used) by operating activities	101,407	78,063	114,448
Cash flows from investing activities:
Purchases of property, plant and equipment	(141,279)	(136,591)	(139,025)
Proceeds from sale of businesses, net	0	57,633	0
Proceeds from sales of assets	9,772	17,057	6,991
Expenditures for intangible assets	(181)	(1,309)	(503)
Proceeds from notes receivable	0	17,023	11,238
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	(18,189)	12,114	4,251
Other investing activities, net	0	0	463
Net cash used by investing activities	(149,877)	(34,073)	(116,585)
Cash flows from financing activities:
Short-term borrowings, net	3,189	(6,198)	7,027
Current maturities and long-term debt:
Additions	119,000	(15,000)	52,000
Proceeds from Issuance of Revolving Credit Facility	0	107,557	0
Repayments of Long-Term Lines of Credit	0	(107,557)	0
Reductions	(5,000)	(5,000)	(5,000)
Payments for Finance Leases and Other Maturities of Long-Term Debt	(19,476)	(13,609)	(9,478)
Proceeds from Issuance of Other Long-Term Debt	566	0	0
Dividends paid to noncontrolling interests	(3,377)	(17,095)	(5)
Payments to Acquire Additional Interest in Subsidiaries	0	(1,197)	0
Contributions from noncontrolling interests	0	874	1,654
Stock-based compensation - Employee taxes paid	(12,764)	(1,885)	(1,426)
Deferred financing costs	(1,818)	(4,290)	0
Net cash (used) provided by financing activities	80,320	(63,400)	44,772
Effect of exchange rate changes on cash, including restricted cash	3,340	(15,046)	(3,115)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	35,190	(34,456)	39,520
Cash and cash equivalents, including restricted cash, at beginning of period	90,158	124,614	85,094
Cash and cash equivalents, including restricted cash, at end of period	125,348	90,158	124,614
Supplementary cash flow information:
Purchases of property, plant and equipment included in accounts payable	23,261	13,158	12,171
Reconciliation of cash and cash equivalents and restricted cash reported in the Consolidated Balance Sheets:
Cash and cash equivalents	103,671	$ 88,359	88,359
Restricted cash	21,677		1,799
Cash and cash equivalents, including restricted cash, at end of period	$ 125,348		$ 90,158