Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 205,586	$ 175,518
Short-term investments	69,608	71,338
Accounts receivable	61,483	74,396
Inventory	100,121	64,384
Prepaid expenses and other current assets	28,066	25,361
Prepaid income taxes	16,884	29,097
Deferred income taxes	12,885	13,324
Total current assets	494,633	453,418
Intangible assets, net	489,584	617,539
Property, equipment and building improvements, net	14,057	10,848
Goodwill	96,798	96,759
Debt issue costs, net	1,848	2,551
Deferred income taxes	18,688	17,988
Other assets	20,595	20,849
Total assets	1,136,203	1,219,952
Current liabilities:
Accounts payable	16,125	21,254
Contingent consideration		8,367
Accrued expenses and other current liabilities	75,563	83,503
Income taxes payable	99	904
Total current liabilities	91,787	114,028
Other non-current liabilities	35	1,898
Financing obligation	4,164
Contingent consideration	27,940	17,710
Deferred tax liability, net	115,901	167,484
Long-term debt	168,467	161,793
Total liabilities	408,294	462,913
Stockholders' equity:
Preferred stock, par value $0.001 per share. 5,000,000 shares authorized; Series A convertible participating preferred stock; no shares issued and outstanding
Common stock, par value $0.002 per share. 175,000,000 shares authorized; outstanding 65,863,021 shares at September 30, 2013 and 65,113,880 shares at December 31, 2012	164	163
Treasury shares, at cost. 16,042,202 shares at September 30, 2013 and 16,042,202 shares at December 31, 2012	(350,000)	(350,000)
Additional paid-in capital	819,927	789,719
Accumulated other comprehensive loss	(3,102)	(2,975)
Retained earnings	260,920	320,132
Total stockholders' equity	727,909	757,039
Total liabilities and stockholders' equity	$ 1,136,203	$ 1,219,952