Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 28,181	$ 15,286
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	16,506	17,735
Amortization	5,356	4,259
Provision for doubtful accounts	120	40
Deferred income taxes	(3,100)	(944)
Loss (gain) on the sale of property, plant and equipment	(239)	14
Gain on assets held for sale	(393)	0
Stock-based compensation expense	8,487	6,863
Changes in operating assets and liabilities
Accounts receivable	(91,200)	18,959
Contract assets	(23,929)	(11,850)
Inventories	(146,178)	(88,634)
Prepaid expenses and other assets	(8,794)	(8,372)
Accounts payable	69,943	92,677
Advance payments from customers	55,433	4,563
Accrued liabilities	(12,177)	(11,854)
Operating leases	(470)	(485)
Income taxes	8,944	2,016
Net cash (used in) provided by operations	(93,510)	40,273
Cash flows from investing activities:
Additions to property, plant and equipment	(23,201)	(16,681)
Proceeds from the sale of property, plant and equipment	280	116
Proceeds from the sale of assets held for sale	5,372	0
Additions to purchased software	(1,770)	(1,938)
Other	5	72
Net cash used in investing activities	(19,314)	(18,431)
Cash flows from financing activities:
Debt issuance costs	(555)	0
Proceeds from stock options exercised	459	346
Employee taxes paid for with shares withheld	(3,014)	(2,973)
Dividends paid	(11,628)	(11,577)
Borrowings under credit agreement	398,000	0
Principal payments on credit agreement	(263,000)	(3,750)
Principal payments on finance leases	(82)	(793)
Share repurchases	(9,391)	(30,319)
Net cash provided by (used in) financing activities	110,789	(49,066)
Effect of exchange rate changes	(5,795)	1,677
Net decrease in cash and cash equivalents and restricted cash	(7,830)	(25,547)
Cash and cash equivalents and restricted cash at beginning of year	271,749	395,990
Cash and cash equivalents and restricted cash at end of period	$ 263,919	$ 370,443