CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities:
Net income	$ 15,900	$ 14,400
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	23,600	28,400
Equity compensation expense	8,800	7,000
Deferred income taxes	(8,600)	(8,900)
Equity in undistributed income of unconsolidated joint ventures	(800)	(900)
Dividends received from unconsolidated joint ventures	1,200	1,500
(Gain) loss on sale or disposal of property, plant and equipment	0	(500)
Other non-cash charges, net	100	(100)
Changes in assets and liabilities:
Accounts receivable	(4,300)	(11,400)
Proceeds from insurance related to operations	4,100	1,000
Contract assets	12,500	(3,400)
Inventories, net	900	11,600
Other current assets	(5,400)	(1,500)
Accounts payable and other accrued expenses	2,900	(17,400)
Other, net	100	(2,300)
Net cash provided by operating activities	51,000	17,500
Investing Activities:
Capital expenditures	(23,500)	(28,000)
Disposition of business	0	1,000
Proceeds from the sale of property, plant and equipment, net	0	600
Proceeds from insurance claims	0	1,800
Net cash used in investing activities	(23,500)	(24,600)
Financing Activities:
Repayment of debt principal and finance lease obligations	(30,200)	(85,200)
Line of credit issuance costs	0	(1,800)
Payments of taxes related to net share settlement of equity awards	(1,200)	(2,500)
Proceeds from issuance of shares to employee stock purchase plan	900	0
Share repurchases	(7,900)	0
Net cash used in financing activities	(38,400)	(89,500)
Effect of exchange rate fluctuations on cash	(900)	2,200
Net decrease in cash and cash equivalents	(11,800)	(94,400)
Cash and cash equivalents at beginning of period	131,700	235,900
Cash and cash equivalents at end of period	119,900	141,500
Supplemental Disclosures:
Accrued capital additions	4,300	1,200
Interest, net of amounts capitalized	500	6,700
Income taxes, net of refunds	$ 7,200	$ 5,600