Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net Income (Loss)	$ 64,315	$ 68,229	$ 35,770
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	34,368	33,339	35,003
Amortization	11,042	10,913	9,149
Provision for doubtful accounts	1,321	489	0
Deferred income taxes	(14,992)	(7,248)	(6,883)
Asset impairments	1,075	0	4,357
(Gain) loss on the sale of property, plant and equipment	(101)	(289)	148
Gain on assets held for sale	0	(393)	0
Stock-based compensation expense	15,286	18,485	15,262
Changes in operating assets and liabilities:
Accounts receivable	42,050	(136,455)	(46,967)
Contract assets	8,634	(28,370)	(12,464)
Inventories	45,071	(206,247)	(197,867)
Prepaid expenses and other assets	(4,648)	(6,467)	(12,201)
Accounts payable	(35,320)	(16,656)	139,952
Advance payments from customers	6,946	79,813	34,002
Accrued liabilities	(13,093)	6,303	(508)
Operating leases	(2,414)	(441)	167
Income taxes	9,926	6,646	792
Net cash provided by (used in) operating activities	174,294	(177,467)	(2,622)
Cash flows from investing activities:
Additions to property, plant and equipment	(73,479)	(43,357)	(38,794)
Additions to capitalized purchased software	(4,260)	(3,417)	(3,383)
Proceeds from the sale of property, plant and equipment	649	321	239
Proceeds from the sale of assets held for sale	0	5,372	0
Other, net	(48)	(93)	63
Net cash used in investing activities	(77,138)	(41,174)	(41,875)
Cash flows from financing activities:
Borrowings under credit agreement	749,500	828,000	150,000
Principal payments on credit agreement	(743,602)	(633,000)	(155,625)
Dividends paid	(23,455)	(23,156)	(23,260)
Employee taxes paid with shares withheld	(5,761)	(3,201)	(3,174)
Proceeds from stock options exercised	129	716	346
Debt issuance costs	(216)	(574)	(1,150)
Principal payments on finance leases	(173)	(165)	(873)
Share repurchases	0	(9,391)	(40,216)
Net cash provided by (used in) financing activities	(23,578)	159,229	(73,952)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,205	(4,907)	(5,792)
Net increase (decrease) in cash, cash equivalents and restricted cash	75,783	(64,319)	(124,241)
Cash, cash equivalents and restricted cash at the beginning of the year	207,430	271,749	395,990
Cash, cash equivalents and restricted cash at the end of the year	$ 283,213	$ 207,430	$ 271,749