CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (24,428)	$ (143,176)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	67,496	66,067
Amortization	16,032	17,067
Deferred income tax (benefit) expense	7,622	(10,396)
Equity (income) loss of unconsolidated entities, net	442	245
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	4,146	1,020
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	(56,383)	87,607
Income tax refunds receivable, reimbursable to seller	0	7,687
Inventories	(7,952)	(8,435)
Contract assets	(3,535)	7,836
Right-of-use assets	16,211	14,383
Accounts payable	12,960	18,847
Accrued interest payable	(192)	(740)
Accrued compensation	9,194	(5,884)
Advances on contracts	(12,978)	(13,626)
Operating lease liabilities	(14,790)	(14,095)
Retirement plan liabilities, net	(5,468)	(21,587)
Other assets and liabilities	5,714	12,067
Net cash (used) provided by operating activities	28,190	117,739
Cash flows from investing activities:
Purchases of property, plant and equipment	(66,341)	(61,791)
Proceeds from sales of assets	1,439	6,591
Expenditures for intangible assets	(427)	(100)
Proceeds from notes receivable	11,238	8,605
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	(2,408)	4,999
Payments for settlements of interest rate swaps	0	(2,123)
Other investing activities, net	84	153
Net cash used by investing activities	(56,415)	(43,666)
Cash flows from financing activities:
Short-term borrowings, net	601	(31)
Current maturities and long-term debt:
Additions	123,996	104,961
Reductions	(90,727)	(152,861)
Contributions from noncontrolling interests	1,654	0
Sale of noncontrolling interests	0	1,901
Stock-based compensation - Employee taxes paid	(1,238)	(1,698)
Payment of contingent consideration	0	(6,915)
Net cash (used) provided by financing activities	34,286	(54,643)
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(1,789)	(5,751)
Net increase in cash and cash equivalents, including restricted cash	4,272	13,679
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	89,366	100,807
Supplementary cash flow information:
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ (3,170)	$ 6,836