CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME / (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Total revenue, net	$ 354,324	$ 359,690
Costs and expenses:
Cost of goods sold	133,476	128,912
Research and development	20,816	18,321
Selling, general and administrative	165,952	174,870
Intangible asset amortization	6,977	5,279
Total costs and expenses	327,221	327,382
Operating income	27,103	32,308
Interest income	2,570	2,428
Interest expense	(17,752)	(13,149)
Other income(expense), net	(479)	3,236
Income before income taxes	11,442	24,823
Provision (benefit) for income taxes	2,262	(7,933)
Net income	$ 9,180	$ 32,756
Net income per share
Basic (in dollars per share)	$ 0.11	$ 0.38
Diluted (in dollars per share)	$ 0.11	$ 0.38
Weighted average common shares outstanding (See Note 13):
Basic (in shares)	85,188	85,343
Diluted (in shares)	85,892	86,258
Comprehensive income (loss) (See Note 14)	$ (19,007)	$ 21,520