QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 228,699	$ 229,948	$ 231,252	$ 232,540	$ 232,531	$ 244,267	$ 236,693	$ 228,867	$ 922,439	$ 942,358	$ 799,023
Gross margin	74,993	76,544	77,349	73,170	68,639	68,430	71,876	71,506	302,056	280,451	243,174
Earnings before income taxes	33,267	36,475	38,400	29,119	25,776	31,085	39,258	37,630	137,261	133,749	125,233
Net earnings	$ 26,648	$ 29,075	$ 30,110	$ 22,710	$ 21,406	$ 25,249	$ 29,782	$ 28,930	$ 108,543	$ 105,367	$ 96,104
Basic net earnings per common share (in dollars per share)	$ 0.83	$ 0.91	$ 0.94	$ 0.71	$ 0.67	$ 0.79	$ 0.93	$ 0.90	$ 3.38	$ 3.29	$ 2.98
Diluted net earnings per common share (in dollars per share)	$ 0.82	$ 0.90	$ 0.93	$ 0.70	$ 0.66	$ 0.78	$ 0.92	$ 0.89	$ 3.35	$ 3.25	$ 2.94