Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 321,677	$ 303,379	$ 639,723	$ 631,986
Cost of goods sold	198,148	197,095	403,514	404,287
Gross Profit	123,529	106,284	236,209	227,699
OPERATING EXPENSES:
Selling, general and administrative	73,921	67,242	146,312	139,547
Research and development	11,385	10,279	22,094	21,025
Restructuring, strategic transaction and integration	3,753	6,482	6,636	18,789
Change in fair value of contingent earn-out	0	2,700	0	2,700
contract settlement	0	25	127	25
TOTAL OPERATING EXPENSES	89,059	86,728	175,169	182,086
INCOME FROM OPERATIONS	34,470	19,556	61,040	45,613
Interest Expense	(163)	(771)	(324)	(967)
OTHER INCOME (EXPENSE), net	525	2,053	1,208	(3,427)
INCOME BEFORE INCOME TAXES	34,832	20,838	61,924	41,219
PROVISION FOR INCOME TAXES	(6,434)	(1,930)	(9,795)	(5,477)
NET INCOME	$ 28,398	$ 18,908	$ 52,129	$ 35,742
NET INCOME PER SHARE
Basic (in dollars per share)	$ 1.34	$ 0.91	$ 2.46	$ 1.72
Diluted (in dollars per share)	$ 1.31	$ 0.88	$ 2.40	$ 1.66
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	21,200	20,880	21,176	20,831
Diluted (in shares)	21,703	21,506	21,718	21,545