Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 534,517	$ 514,551	$ 469,333
Cost of sales	396,687	358,702	349,908
Gross profit	137,830	155,849	119,425
Selling, general and administrative expenses	68,598	60,491	52,077
(Gain) loss on disposal of assets and insurance recoveries	(21)	(6,478)	337
Income from operations	69,253	101,836	67,011
Interest (expense) income, net	(132)	88	66
Other income (expense), net	61	51	(46)
Income before taxes	69,182	101,975	67,031
Income tax provision	10,424	22,966	13,320
Net income	$ 58,758	$ 79,009	$ 53,711
Earnings per share:
Basic (usd per share)	$ 1.12	$ 1.51	$ 1.03
Diluted (usd per share)	1.09	1.49	1.02
Cash dividends declared per common share (in dollars per share)	$ 0.38	$ 0.38	$ 0.32
Weighted average shares outstanding:
Basic (in shares)	52,404,199	52,168,679	52,079,865
Diluted (in shares)	53,728,989	53,061,169	52,635,415