Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income	$ 27,369	$ 27,086
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Depreciation	20,556	15,864
Amortization	1,748	1,503
Change in deferred taxes and other liabilities	(675)	(887)
Impairment of property, plant and equipment	49	100
Non-cash interest expense	256	280
Compensation and benefits paid or payable in Class A Common Stock	810	378
Provision for credit losses from uncollected receivables and contract assets	365	309
Foreign currency remeasurement (gain) on intercompany loans	(792)	(1,732)
Fair value adjustment on foreign currency options	280	58
Changes in operating assets and liabilities that provided/(used) cash:
Accounts receivable	(17,061)	(13,702)
Contract assets	2,982	(4,403)
Inventories	1,917	(12,360)
Prepaid expenses and other current assets	(6,525)	(2,191)
Income taxes prepaid and receivable	(721)	(693)
Accounts payable	7,730	5,214
Accrued liabilities	(22,739)	(23,137)
Income taxes payable	(5,466)	(10,996)
Noncurrent receivables	(178)	867
Other noncurrent liabilities	506	7
Other, net	(814)	2,042
Net cash provided by/(used in) operating activities	9,597	(16,393)
Cash flows from investing activities:
Purchases of property, plant and equipment	(26,859)	(16,275)
Purchased software	(21)	0
Net cash used in investing activities	(26,880)	(16,275)
Cash flows from financing activities:
Proceeds from borrowings	43,237	58,000
Principal payments on debt	(60,750)	(6,000)
Taxes paid in lieu of share issuance	(2,446)	(3,136)
Dividends paid	(8,110)	(7,778)
Net cash (used in)/provided by financing activities	(28,069)	41,086
Effect of exchange rate changes on cash and cash equivalents	(2,656)	4,064
(Decrease)/increase in cash and cash equivalents	(48,008)	12,482
Cash and cash equivalents at beginning of period	173,420	291,776
Cash and cash equivalents at end of period	$ 125,412	$ 304,258