CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net income	$ 34,483	$ 59,873
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	22,980	20,997
Equity compensation expense	8,056	8,394
Deferred income taxes	(8,728)	3,881
Equity in undistributed income of unconsolidated joint ventures	(3,075)	(4,111)
Dividends received from unconsolidated joint ventures	1,509	1,754
Pension and other postretirement benefits	23	(190)
(Gain) loss on sale or disposal of property, plant and equipment	(18)	(682)
Impairment charges	212	0
UTIS fire fixed asset and inventory write-offs	200	1,211
Provision (benefit) for credit losses	89	(342)
Changes in assets and liabilities:
Accounts receivable	(27,116)	(24,609)
Proceeds from insurance/government subsidies related to operations	334	148
Contract assets	(3,964)	(3,710)
Inventories	(41,702)	(10,527)
Pension and postretirement benefit contributions	(117)	(151)
Other current assets	(5,962)	(3,767)
Accounts payable and other accrued expenses	(1,976)	14,547
Other, net	13,096	3,490
Net cash (used in) provided by operating activities	(11,676)	66,206
Investing Activities:
Acquisition of business, net of cash received	(1,300)	0
Capital expenditures	(53,205)	(21,415)
Proceeds from the sale of property, plant and equipment, net	0	714
Proceeds from insurance claims	2,262	0
Net cash used in investing activities	(52,243)	(20,701)
Financing Activities:
Proceeds from borrowings under revolving credit facility	70,000	0
Repayment of debt principal and finance lease obligations	(143)	(29,652)
Payments of taxes related to net share settlement of equity awards	(10,623)	(2,684)
Proceeds from issuance of shares to employee stock purchase plan	950	704
Net cash provided by (used in) financing activities	60,184	(31,632)
Effect of exchange rate fluctuations on cash	(3,229)	(1,713)
Net (decrease) increase in cash and cash equivalents	(6,964)	12,160
Cash and cash equivalents at beginning of period	232,296	191,785
Cash and cash equivalents at end of period	225,332	203,945
Supplemental Disclosures:
Accrued capital additions	13,527	7,403
Interest, net of amounts capitalized	2,550	964
Income taxes	$ 13,426	$ 18,036