Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 100,376	$ 58,758	$ 79,009
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	35,106	30,343	25,634
Amortization of debt issuance costs	43	43	43
Amortization of right of use assets	324	73	0
Provision for credit losses on accounts receivable, net of adjustments	(72)	43	153
Provision for excess and obsolete inventories	2,740	629	1,108
Share-based compensation	13,700	11,812	11,342
Gain on disposition of assets and insurance recoveries	(12)	(21)	(6,478)
Foreign currency transaction loss (gain)	41	(1)	(12)
Interest income on note receivable	(22)	(24)	(24)
Deferred income taxes	(13,332)	3,669	13,027
Changes in assets and liabilities:
Accounts receivable	(56,306)	(9,737)	19,859
Income tax receivable	18,195	(1,136)	(3,815)
Inventories	(71,409)	(45,955)	(9,726)
Contract assets	(9,402)	1,886	0
Prepaid expenses and other	(2,367)	1,374	(2,364)
Accounts payable	11,574	10,899	(2,155)
Contract liabilities	13,882	(229)	0
Deferred revenue	1,314	447	1,010
Accrued liabilities and other long-term liabilities	16,945	(1,690)	2,203
Net cash provided by operating activities	61,318	61,183	128,814
Investing Activities
Capital expenditures	(54,024)	(55,362)	(67,802)
Cash paid for building (Note 4)	(22,000)	0	0
Cash paid in business combination, net of cash acquired	(249)	(103,430)	0
Proceeds from sale of property, plant and equipment	12	19	60
Insurance proceeds	0	0	6,417
Principal payments from note receivable	48	54	52
Net cash used in investing activities	(76,213)	(158,719)	(61,273)
Financing Activities
Borrowings under revolving credit facility	225,758	40,000	0
Payments under revolving credit facility	(194,754)	0	0
Principal payments on financing lease	(115)	0	0
Stock options exercised	23,140	21,148	21,418
Repurchase of stock	(12,737)	(20,876)	(30,060)
Employee taxes paid by withholding shares	(1,018)	(1,590)	(1,169)
Dividends paid to stockholders	(22,917)	(19,947)	(19,815)
Net cash provided by (used in) financing activities	17,357	18,735	(29,626)
Net increase (decrease) in cash, cash equivalents and restricted cash	2,462	(78,801)	37,915
Cash, cash equivalents and restricted cash, beginning of year	3,487	82,288	44,373
Cash, cash equivalents and restricted cash, end of year	$ 5,949	$ 3,487	$ 82,288