QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 232,531	$ 244,267	$ 236,693	$ 228,867	$ 213,133	$ 197,869	$ 202,365	$ 185,656	$ 942,358	$ 799,023	$ 703,644
Gross margin	68,639	68,430	71,876	71,506	64,066	60,934	59,447	58,727	280,451	243,174	223,897
Earnings before income taxes	25,776	31,085	39,258	37,630	33,146	32,085	30,019	29,983	133,749	125,233	106,417
Net earnings	$ 21,406	$ 25,249	$ 29,782	$ 28,930	$ 24,949	$ 25,013	$ 22,731	$ 23,411	$ 105,367	$ 96,104	$ 84,623
Basic net earnings per common share (in dollars per share)	$ 0.67	$ 0.79	$ 0.93	$ 0.90	$ 0.78	$ 0.78	$ 0.71	$ 0.73	$ 3.29	$ 2.98	$ 2.63
Diluted net earnings per common share (in dollars per share)	$ 0.66	$ 0.78	$ 0.92	$ 0.89	$ 0.76	$ 0.77	$ 0.70	$ 0.72	$ 3.25	$ 2.94	$ 2.60