CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
ASSETS
Cash and cash equivalents	$ 436,735	$ 635,755
Short-term investments	1,116,675	823,254
Accounts receivable, net	230,457	170,201
Inventories	289,526	217,278
Prepaid expenses	33,931	25,658
Deferred tax assets	116,866	91,191
Other current assets	65,088	52,524
Total current assets	2,289,278	2,015,861
Property, plant and equipment, net	536,727	516,611
Long-term investments	154,002	328,586
Goodwill	260,059	93,513
Intangible assets, net	607,127	90,436
Other assets	41,183	38,769
Total assets	3,888,376	3,083,776
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	82,265	50,287
Accrued liabilities	120,086	88,877
Deferred income on shipments to distributors	123,122	108,709
Total current liabilities	325,473	247,873
Junior convertible debentures	359,656	355,050
Long-term line of credit	600,000	0
Long-term income tax payable	179,807	70,490
Deferred tax liability	434,603	411,368
Other long-term liabilities	24,739	8,322
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued or outstanding.	0	0
Common stock, $0.001 par value; 450,000,000 shares authorized; 218,789,994 shares issued and 194,496,867 shares outstanding at September 30, 2012; 218,789,994 shares issued and 193,150,532 shares outstanding at March 31, 2012	194	193
Additional paid-in capital	1,277,126	1,268,907
Retained earnings	1,420,996	1,499,365
Accumulated other comprehensive (loss) income	6,689	3,101
Common stock held in treasury: 24,293,127 shares at September 30, 2012; 25,639,462 shares at March 31, 2012	(740,907)	(780,893)
Total stockholders' equity	1,964,098	1,990,673
Total liabilities and stockholders' equity	$ 3,888,376	$ 3,083,776