CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 1,153,354	$ 848,456	$ 717,476
Costs of operations	1,001,500	766,037	647,624
Gross profit	151,854	82,419	69,852
Operating expenses:
Selling, general and administrative expenses	73,087	52,827	46,233
Non-operating expenses:
Interest expense, net	5,974	3,379	1,355
Other (income) expense, net	(991)	481	498
Total expense, net	78,070	56,687	48,086
Income before income taxes	73,784	25,732	21,766
Income tax provision	15,493	5,386	5,511
Net income	$ 58,291	$ 20,346	$ 16,255
Basic income per common share (in dollars per share)	$ 5.10	$ 1.78	$ 1.42
Diluted income per common share (in dollars per share)	5.07	1.78	1.42
Cash dividends declared per common share (in dollars per share)	$ 0.72	$ 0.72	$ 0.72
Weighted average shares outstanding:
Basic (in shares)	11,438,965	11,416,667	11,410,728
Diluted (in shares)	11,506,960	11,416,667	11,410,728