Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 336,060	$ 318,567	$ 975,783	$ 950,553
Cost of goods sold	208,269	204,643	611,783	608,930
Gross Profit	127,791	113,924	364,000	341,623
OPERATING EXPENSES:
Selling, general and administrative	74,815	70,854	221,127	210,401
Research and development	12,238	10,126	34,332	31,151
Restructuring, strategic transaction and integration	2,358	4,114	8,994	22,903
Change in fair value of contingent earn-out	0	4,300	0	7,000
contract settlement	0	(1,000)	127	(975)
TOTAL OPERATING EXPENSES	89,411	88,394	264,580	270,480
INCOME FROM OPERATIONS	38,380	25,530	99,420	71,143
Interest Expense	(168)	(616)	(492)	(1,583)
OTHER INCOME (EXPENSE), net	(287)	1,252	921	(2,175)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	37,925	26,166	99,849	67,385
PROVISION FOR INCOME TAXES	(6,844)	(1,180)	(16,639)	(6,657)
NET INCOME	$ 31,081	$ 24,986	$ 83,210	$ 60,728
NET INCOME PER SHARE
Basic (in dollars per share)	$ 1.47	$ 1.19	$ 3.93	$ 2.91
Diluted (in dollars per share)	$ 1.43	$ 1.16	$ 3.83	$ 2.82
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	21,214	20,948	21,189	20,870
Diluted (in shares)	21,730	21,556	21,735	21,561