Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income	$ 177,623	$ 100,376	$ 58,758
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,468	35,106	30,343
Amortization of debt issuance costs	82	43	43
Amortization of right of use assets	324	324	73
(Recoveries of) provision for credit losses on accounts receivable, net of adjustments	(154)	(72)	43
Provision for excess and obsolete inventories, net of write-offs	1,633	2,740	629
Share-based compensation	16,384	13,700	11,812
Gain on disposition of assets	(13)	(12)	(21)
Foreign currency transaction (gain) loss	(10)	41	(1)
Interest income on note receivable	(21)	(22)	(24)
Deferred income taxes	(6,527)	(13,332)	3,669
Changes in assets and liabilities:
Accounts receivable	(9,978)	(56,306)	(9,737)
Income taxes	(11,302)	18,195	(1,136)
Inventories	(16,226)	(71,409)	(45,955)
Contract assets	(30,043)	(9,402)	1,886
Prepaid expenses and other long-term assets	(1,048)	(2,367)	1,374
Accounts payable	(18,316)	11,574	10,899
Contract liabilities	(7,667)	13,882	(229)
Extended warranties	2,600	1,314	447
Accrued liabilities and other long-term liabilities	15,086	16,945	(1,690)
Net cash provided by operating activities	158,895	61,318	61,183
Investing Activities
Capital expenditures	(104,294)	(54,024)	(55,362)
Cash paid for building (Note 4)	0	(22,000)	0
Cash paid in business combination, net of cash acquired	0	(249)	(103,430)
Proceeds from sale of property, plant and equipment	129	12	19
Acquisition of intangible assets	(5,197)	0	0
Principal payments from note receivable	51	48	54
Net cash used in investing activities	(109,311)	(76,213)	(158,719)
Financing Activities
Borrowings under revolving credit facility	597,111	225,758	40,000
Payments under revolving credit facility	(629,787)	(194,754)	0
Proceeds from financing obligation, net of issuance costs	6,061	0	0
Payments related to financing costs	(398)	0	0
Principal payments on financing lease	0	(115)	0
Stock options exercised	33,259	23,140	21,148
Repurchase of stock	(25,009)	(12,737)	(20,876)
Employee taxes paid by withholding shares	(1,302)	(1,018)	(1,590)
Dividends paid to stockholders	(26,445)	(22,917)	(19,947)
Net cash (used in) provided by financing activities	(46,510)	17,357	18,735
Net increase (decrease) in cash, cash equivalents and restricted cash	3,074	2,462	(78,801)
Cash, cash equivalents and restricted cash, beginning of year	5,949	3,487	82,288
Cash, cash equivalents and restricted cash, end of year	$ 9,023	$ 5,949	$ 3,487