CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 275,415	$ 248,913
Cost of sales	154,508	137,019
Gross profit	120,907	111,894
Operating expenses:
Selling, general and administrative	84,015	81,024
Research and development	17,387	16,274
Impairment charges	1,672	0
Contingent consideration expense	2,600	402
Total operating expenses	105,674	97,700
Income from operations	15,233	14,194
Other income (expense):
Interest income	104	472
Interest expense	(1,002)	(1,537)
Other expense - net	(164)	(435)
Total other expense - net	(1,062)	(1,500)
Income before income taxes	14,171	12,694
Income tax expense	3,626	1,736
Net income	$ 10,545	$ 10,958
Earnings per common share
Basic (in dollars per share)	$ 0.19	$ 0.20
Diluted (in dollars per share)	$ 0.18	$ 0.19
Weighted average shares outstanding
Basic (in shares)	56,593	55,717
Diluted (in shares)	57,531	56,978