Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net income	$ 3,644	$ 14,002
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	9,162	9,054
Amortization	2,606	2,540
Stock-based compensation expense	4,397	2,176
Provision for doubtful accounts	0	390
Deferred income taxes	(1,594)	(1,847)
Loss on the sale of property, plant and equipment	132	15
Changes in operating assets and liabilities:
Accounts receivable	39,870	30,960
Contract assets	(4,410)	(5,835)
Inventories	(5,182)	45,222
Prepaid expenses and other assets	(613)	(2,957)
Accounts payable	24,194	(20,259)
Advance payments from customers	(15,755)	(15,730)
Accrued liabilities	(26,254)	(11,833)
Operating leases	644	121
Income taxes	662	2,438
Net cash provided by operating activities	31,503	48,457
Cash flows from investing activities:
Additions to property, plant and equipment	(3,395)	(5,183)
Additions to capitalized purchased software	(761)	(720)
Proceeds from the disposal of property, plant and equipment	50	0
Other, net	0	(251)
Net cash used in investing activities	(4,106)	(6,154)
Cash flows from financing activities:
Borrowings under credit agreement	175,000	175,000
Principal payments on credit agreement	(156,641)	(190,820)
Dividends paid	(6,119)	(5,889)
Employee taxes paid with shares withheld	(6,670)	(5,758)
Proceeds from stock options exercised	4	371
Principal payments on finance leases	(47)	(45)
Share repurchases	(7,996)	0
Net cash used in financing activities	(2,469)	(27,141)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,385	(2,320)
Net increase in cash, cash equivalents and restricted cash	27,313	12,842
Cash, cash equivalents and restricted cash at the beginning of the year	328,027	283,213
Cash, cash equivalents and restricted cash at the end of the period	355,340	296,055
Supplemental cash flow information:
Income taxes paid, net	5,680	4,470
Interest paid	5,030	7,399
Property, Plant and Equipment [Member]
Non-cash investing activities:
Unpaid purchases at the end of the period	10,371	1,714
Capitalized Purchased Software Costs [Member]
Non-cash investing activities:
Unpaid purchases at the end of the period	$ 526	$ 1,320