CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Total revenue, net	$ 386,861	$ 370,232	$ 1,136,924	$ 983,221
Costs and expenses:
Cost of goods sold	144,468	134,811	441,558	373,765
Research and development	25,831	19,460	68,326	55,202
Selling, general and administrative	156,010	150,076	475,195	432,136
Intangible asset amortization	4,113	8,343	12,838	23,393
Total costs and expenses	330,422	312,690	997,917	884,496
Operating income	56,439	57,542	139,007	98,725
Interest income	1,786	2,273	5,298	7,124
Interest expense	(12,192)	(20,796)	(38,270)	(54,230)
Gain (loss) from the sale of business	(230)	0	41,967	0
Other income, net	4,985	2,492	14,888	2,985
Income before income taxes	50,788	41,511	162,890	54,604
Provision for income taxes	7,559	9,174	39,199	13,456
Net income	$ 43,229	$ 32,337	$ 123,691	$ 41,148
Net income per share
Basic (in dollars per share)	$ 0.51	$ 0.38	$ 1.46	$ 0.49
Diluted (in dollars per share)	$ 0.51	$ 0.38	$ 1.45	$ 0.48
Weighted average common shares outstanding (See Note 13):
Basic (in shares)	84,754	84,325	84,647	84,745
Diluted (in shares)	85,447	84,752	85,391	85,303
Comprehensive income (See Note 14)	$ 46,417	$ 43,548	$ 150,975	$ 25,637