Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net sales:
Total net sales	$ 1,513,616	$ 1,334,223	$ 1,163,466
Cost of sales	1,137,098	999,709	869,736
Gross profit	376,518	334,514	293,730
Selling, general and administrative expenses	212,649	202,939	184,199
Amortization expense	15,277	14,637	14,746
Income from operations	148,592	116,938	94,785
Interest expense	(14,361)	(10,533)	(15,837)
Interest income	752	1,149	1,366
Other income	(673)	1,944	(557)
Income before income taxes	134,310	109,498	79,757
Provision for income taxes	32,382	29,253	21,953
Net income	$ 101,928	$ 80,245	$ 57,804
Net income per common share:
Basic (in dollars per share)	$ 8.58	$ 6.78	$ 4.91
Diluted (in dollars per share)	$ 8.54	$ 6.75	$ 4.88
Average common shares:
Basic (in shares)	11,877	11,837	11,782
Diluted (in shares)	11,934	11,896	11,845
Vegetation Management
Net sales:
Total net sales	$ 937,065	$ 812,676	$ 654,630
Income from operations	108,508	78,917	46,651
Industrial Equipment
Net sales:
Total net sales	576,551	521,547	508,836
Income from operations	$ 40,084	$ 38,021	$ 48,134