CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Total revenue, net	$ 196,652	$ 196,185
Costs and Expenses:
Cost of goods sold	80,268	74,675
Research and development	12,716	11,912
Selling, general and administrative	100,161	87,411
Intangible asset amortization	3,551	4,720
Total costs and expenses	196,696	178,718
Operating (loss) income	(44)	17,467
Interest income	63	378
Interest expense	(4,800)	(7,929)
Other income (expense), net	(974)	(323)
(Loss) income before income taxes	(5,755)	9,593
Income tax (benefit) expense	(1,705)	2,900
Net (loss) income	(4,050)	6,693
Basic net income per common share (in dollars per share)	$ (0.15)	$ 0.24
Diluted net income per common share (in dollars per share)	$ (0.15)	$ 0.23
Weighted average common shares outstanding (See Note 11):
Basic (in shares)	27,796	28,345
Diluted (in shares)	27,796	28,488
Comprehensive (loss) income (See Note 12)	$ (10,534)	$ 13,639