Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 191,398	$ 175,518
Short-term investments	67,335	71,338
Accounts receivable	55,949	74,396
Inventory	87,834	64,384
Prepaid expenses and other current assets	28,305	25,361
Prepaid income taxes	19,309	29,097
Deferred income taxes	18,397	13,324
Total current assets	468,527	453,418
Intangible assets, net	494,392	617,539
Property, equipment and building improvements, net	12,289	10,848
Goodwill	96,264	96,759
Debt issue costs, net	2,082	2,551
Deferred income taxes	19,815	17,988
Other assets	19,737	20,849
Total assets	1,113,106	1,219,952
Current liabilities:
Accounts payable	16,412	21,254
Contingent consideration		8,367
Accrued expenses and other current liabilities	72,941	83,503
Income taxes payable	410	904
Total current liabilities	89,763	114,028
Other non-current liabilities	35	1,898
Financing obligation	1,929
Contingent consideration	25,346	17,710
Deferred tax liability, net	120,050	167,484
Long-term debt	166,205	161,793
Total liabilities	403,328	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 65,457,373 shares at June 30, 2013 and 65,113,880 shares at December 31, 2012	163	163
Treasury shares, at cost. 16,042,202 shares at June 30, 2013 and 16,042,202 shares at December 31, 2012	(350,000)	(350,000)
Additional paid-in capital	806,682	789,719
Accumulated other comprehensive loss	(3,801)	(2,975)
Retained earnings	256,734	320,132
Total stockholders' equity	709,778	757,039
Total liabilities and stockholders' equity	$ 1,113,106	$ 1,219,952