CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Product sales	$ 87,478	$ 88,375
Royalties, fees and other	4,870	4,497
Total revenues	92,348	92,872
Cost of product sales	28,328	26,651
Gross profit	64,020	66,221
Operating expenses:
Research and development	8,445	7,594
Sales and marketing	30,332	30,200
General and administrative	7,458	8,488
Amortization of intangible assets	423	1,321
Exit costs		160
Investigation and restatement related costs	3,893	1,093
Total operating expenses	50,551	48,856
Income from operations	13,469	17,365
Non-operating gains	522	386
Income before income taxes	13,991	17,751
Income tax provision	2,806	4,793
Net income	11,185	12,958
Accrued dividend and accretion charges on Series A 3% Redeemable Convertible Preferred Stock	(919)	(879)
Net income available to common stockholders	10,266	12,079
Other comprehensive income
Foreign currency translation adjustments	(1,099)	392
Total comprehensive income	$ 10,086	$ 13,350
Weighted average shares outstanding:
Basic (in shares)	28,055	27,614
Diluted (in shares)	28,785	27,987
Earnings per share applicable to common stockholders:
Basic (in dollars per share)	$ 0.30	$ 0.36
Diluted (in dollars per share)	$ 0.30	$ 0.36