Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 44,904	$ 46,763
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	26,897	25,443
Amortization	7,681	8,660
Stock-based compensation expense	10,740	12,331
Provision for doubtful accounts	671	1,321
Deferred income taxes	(5,119)	(4,465)
Asset impairments	0	1,075
Gain on the sale of property, plant and equipment	(7)	(335)
Changes in operating assets and liabilities
Accounts receivable	76,479	12,937
Contract assets	(11,559)	(6,472)
Inventories	102,540	1,789
Prepaid expenses and other assets	(8,888)	(14,433)
Accounts payable	(16,107)	(24,420)
Advance payments from customers	(59,533)	(8,879)
Accrued liabilities	(28,127)	(14,201)
Operating leases	1,192	830
Income taxes	1,545	(730)
Net cash provided by operating activities	143,309	37,214
Cash flows from investing activities:
Additions to property, plant and equipment	(22,555)	(64,014)
Additions to capitalized purchased software	(1,666)	(2,699)
Proceeds from the disposal of property, plant and equipment	2,004	636
Other, net	(1,521)	(48)
Net cash used in investing activities	(23,738)	(66,125)
Cash flows from financing activities:
Borrowings under credit agreement	455,000	614,500
Principal payments on credit agreement	(507,461)	(506,961)
Dividends paid	(17,794)	(17,570)
Employee taxes paid for with shares withheld	(6,195)	(5,804)
Proceeds from stock options exercised	482	68
Debt issuance costs	0	(216)
Principal payments on finance leases	(135)	(129)
Share repurchases	(5,101)	0
Net cash (used in) provided by financing activities	(81,204)	83,888
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,843	(1,647)
Net increase in cash, cash equivalents and restricted cash	41,210	53,330
Cash, cash equivalents and restricted cash at the beginning of the year	283,213	207,430
Cash, cash equivalents and restricted cash at the end of the period	$ 324,423	$ 260,760