CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Total Revenue	$ 210,170	$ 193,329	$ 406,355	$ 374,370
Costs and Expenses:
Cost of goods sold	78,274	72,838	152,949	137,759
Research and development	13,131	12,709	25,043	24,862
Selling, general and administrative	96,097	95,732	183,508	175,816
Intangible asset amortization	4,647	4,050	9,367	7,061
Total costs and expenses	192,149	185,329	370,867	345,498
Operating income	18,021	8,000	35,488	28,872
Interest income	415	127	793	200
Interest expense	(7,103)	(6,722)	(15,032)	(12,191)
Other income (expense), net	236	593	(87)	(50)
Income before income taxes	11,569	1,998	21,162	16,831
Income tax expense	3,055	1,299	5,955	4,645
Net income	8,514	699	15,207	12,186
Basic net income per common share	$ 0.30	$ 0.02	$ 0.54	$ 0.41
Diluted net income per common share	$ 0.30	$ 0.02	$ 0.53	$ 0.40
Weighted average common shares outstanding (See Note 12):
Basic	28,419	29,556	28,382	29,559
Diluted	28,609	30,178	28,549	30,154
Comprehensive income (loss) (See Note 13)	$ (2,730)	$ 4,195	$ 10,911	$ 29,838