Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 138,774	$ 87,021
Marketable securities	174,409	218,789
Trade accounts receivable, net of allowance for doubtful accounts of $293 and $320 as of March 31, 2012 and December 31, 2011, respectively	67,199	57,767
Accounts receivable - other	2,317	3,446
Inventories	81,331	77,886
Deferred income tax	8,707	8,188
Prepaid expenses	15,792	11,555
Other current assets	3,732	4,967
Total current assets	492,261	469,619
Marketable securities, net of current portion	88,101	62,237
Property, plant and equipment, net	180,270	176,081
Capitalized software, net	17,961	16,992
Patents, net	11,486	11,758
Goodwill	140,385	140,404
Purchased intangibles, net	104,553	106,619
License, manufacturing access fees and other assets, net	61,246	61,738
Total assets	1,096,263	1,045,448
Current liabilities
Accounts payable	14,260	12,000
Accrued salaries and employee benefits	21,533	28,795
Other accrued expenses	17,584	12,846
Income tax payable	6,428	1,857
Short-term borrowings	248,000	248,000
Deferred revenue	1,413	1,238
Total current liabilities	309,218	304,736
Non-current income tax payable	10,044	10,019
Deferred income tax	19,283	19,283
Deferred revenue, net of current portion	3,644	3,237
Other long-term liabilities	7,910	7,831
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.0001 par value per share; 20,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 45,342,898 and 45,008,879 shares issued and outstanding as of March 31, 2012 and December 31, 2011, respectively	5	5
Additional paid-in capital	43,954	23,650
Accumulated other comprehensive income (loss)	2,745	(313)
Retained earnings	699,460	677,000
Total stockholders' equity	746,164	700,342
Total liabilities and stockholders' equity	$ 1,096,263	$ 1,045,448