Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 390,395	$ 426,732
Short-term investments	127,845	78,439
Accounts receivable, net	68,676	43,879
Inventory	61,283	54,388
Prepaid expenses and other current assets	7,998	13,959
Prepaid income taxes	8,691	2,000
Deferred income taxes	11,285	13,744
Total current assets	676,173	633,141
Intangible assets, net	611,476	619,712
Property, equipment and building improvements, net	12,998	11,468
Goodwill	6,448	6,228
Debt issue costs, net	2,203	2,397
Deferred income taxes	8,284	4,252
Other assets	11,199	10,376
Total assets	1,328,781	1,287,574
Liabilities and Stockholders' Equity
Accounts payable	13,521	10,215
Contingent consideration	13,853	10,973
Accrued expenses and other current liabilities	62,703	48,990
Income taxes payable	798	1,944
Total current liabilities	90,875	72,122
Other non-current liabilities	2,198	2,463
Deferred tax liability	173,567	176,111
Long-term debt	149,523	145,743
Total liabilities	416,163	396,439
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; issued and outstanding 75,893,066 shares at June 30, 2011 and 78,141,491 shares at December 31, 2010	157	156
Treasury shares, at cost. 2,668,744 shares at June 30, 2011 and 0 shares at December 31, 2010	(50,000)
Additional paid-in capital	728,616	717,375
Accumulated other comprehensive income (loss)	741	(258)
Retained earnings	233,104	173,862
Total stockholders' equity	912,618	891,135
Total liabilities and stockholders' equity	$ 1,328,781	$ 1,287,574