CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Total revenue, net	$ 205,547	$ 210,170	$ 402,199	$ 406,355
Costs and Expenses:
Cost of goods sold	83,068	78,274	163,336	152,949
Research and development	11,809	13,131	24,525	25,043
Selling, general and administrative	99,619	96,097	199,780	183,508
Intangible asset amortization	3,073	4,647	6,624	9,367
Total costs and expenses	197,569	192,149	394,265	370,867
Operating income	7,978	18,021	7,934	35,488
Interest income	289	415	352	793
Interest expense	(4,965)	(7,103)	(9,765)	(15,032)
Other income (expense), net	(307)	236	(1,281)	(87)
Income (loss) before income taxes	2,995	11,569	(2,760)	21,162
Income tax (benefit) expense	(445)	3,055	(2,150)	5,955
Net income (loss)	3,440	8,514	(610)	15,207
Basic net income per common share (in dollars per share)	$ 0.12	$ 0.30	$ (0.02)	$ 0.54
Diluted net income per common share (in dollars per share)	$ 0.12	$ 0.30	$ (0.02)	$ 0.53
Weighted average common shares outstanding (See Note 11):
Basic (in shares)	27,873	28,419	27,834	28,382
Diluted (in shares)	28,118	28,609	27,834	28,549
Comprehensive income (loss) (See Note 12)	$ 5,317	$ (2,730)	$ (5,217)	$ 10,911