CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 26,681	$ 52,089
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	40,085	41,247
Amortization	2,957	3,446
Change in deferred taxes and other liabilities	(2,761)	(2,391)
Impairment of property, plant and equipment	(66)	120
Non-cash interest expense	513	513
Compensation and benefits paid or payable in Class A Common Stock	3,654	4,243
Provision/(recovery) for credit losses from uncollected receivables and contract assets	1,021	(174)
Foreign currency remeasurement loss/(gain) on intercompany loans	7,171	(2,580)
Fair value adjustment on foreign currency contracts	0	3,109
Gain on sale of assets	(1,566)	(512)
Changes in operating assets and liabilities that provided/(used) cash:
Accounts receivable	(4,490)	4,929
Contract assets	(15,329)	(8,435)
Inventories	(8,179)	3,062
Prepaid expenses and other current assets	(2,565)	(2,454)
Income taxes prepaid and receivable	743	873
Accounts payable	26,878	17,679
Accrued liabilities	(23,314)	(15,367)
Income taxes payable	(17,191)	(5,599)
Noncurrent receivables	(201)	(379)
Other noncurrent liabilities	(2,927)	(924)
Other, net	3,719	494
Net cash provided by operating activities	34,833	92,989
Cash flows from investing activities:
Purchases of property, plant and equipment	(29,526)	(46,616)
Purchased software	(1,005)	(40)
Proceeds received from sale of assets	3,243	1,029
Net cash used in investing activities	(27,288)	(45,627)
Cash flows from financing activities:
Proceeds from borrowings	171,995	43,282
Principal payments on debt	(58,046)	(122,828)
Purchase of Treasury shares	(120,448)	0
Taxes paid in lieu of share issuance	(1,316)	(2,446)
Dividends paid	(16,693)	(16,233)
Net cash used in financing activities	(24,508)	(98,225)
Effect of exchange rate changes on cash and cash equivalents	8,369	(6,118)
Decrease in cash and cash equivalents	(8,594)	(56,981)
Cash and cash equivalents at beginning of period	115,283	173,420
Cash and cash equivalents at end of period	$ 106,689	$ 116,439