CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (34,522)	$ (140,295)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	102,893	97,959
Amortization	24,327	25,605
Deferred income tax (benefit) expense	2,198	(12,056)
Equity (income) loss of unconsolidated entities, net	593	373
Dividends from unconsolidated entities	0	526
(Gain) loss on early extinguishment of debt	0	(2,254)
Goodwill impairment	0	104,580
Property, plant and equipment impairment charge	14,099	0
Other, net	4,743	381
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	(48,166)	74,994
Income tax refunds receivable, reimbursable to seller	0	7,687
Inventories	(10,548)	(11,339)
Contract assets	1,317	9,589
Right-of-use assets	24,467	21,829
Accounts payable	(818)	13,030
Accrued interest payable	(6,828)	(7,559)
Accrued compensation	20,436	(5,559)
Advances on contracts	(21,824)	(5,987)
Operating lease liabilities	(22,980)	(21,498)
Retirement plan liabilities, net	(4,862)	(27,829)
Other assets and liabilities	1,647	8,984
Net cash (used) provided by operating activities	46,172	131,161
Cash flows from investing activities:
Purchases of property, plant and equipment	(93,630)	(101,645)
Proceeds from sales of assets	2,080	8,289
Expenditures for intangible assets	(478)	(147)
Proceeds from notes receivable	11,238	8,605
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	2,034	13,571
Payments for settlements of interest rate swaps	0	(2,586)
Other investing activities, net	462	220
Net cash used by investing activities	(78,294)	(73,693)
Cash flows from financing activities:
Short-term borrowings, net	4,196	277
Current maturities and long-term debt:
Additions	185,992	159,429
Reductions	(140,522)	(198,831)
Dividends paid to noncontrolling interests	0	(4,841)
Contributions from noncontrolling interests	1,654	0
Sale of noncontrolling interests	0	1,901
Stock-based compensation - Employee taxes paid	(1,374)	(1,817)
Payment of contingent consideration	0	(6,915)
Net cash (used) provided by financing activities	49,946	(50,797)
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(4,231)	(8,762)
Net increase (decrease) in cash and cash equivalents, including restricted cash	13,593	(2,091)
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	98,687	85,037
Supplementary cash flow information:
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ (3,252)	$ 7,419