CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
ASSETS
Cash and cash equivalents	$ 779,848	$ 635,755
Short-term investments	881,913	823,254
Accounts receivable, net	174,685	170,201
Inventories	221,481	217,278
Prepaid expenses	25,588	25,658
Deferred tax assets	94,968	91,191
Other current assets	50,815	52,524
Total current assets	2,229,298	2,015,861
Property, plant and equipment, net	506,229	516,611
Long-term investments	159,476	328,586
Goodwill	102,193	93,513
Intangible assets, net	110,257	90,436
Other assets	37,387	38,769
Total assets	3,144,840	3,083,776
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	52,646	50,287
Accrued liabilities	86,550	88,877
Deferred income on shipments to distributors	110,793	108,709
Total current liabilities	249,989	247,873
Junior convertible debentures	357,355	355,050
Long-term income tax payable	73,261	70,490
Deferred tax liability	416,980	411,368
Other long-term liabilities	29,265	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 193,682,267 shares outstanding at June 30, 2012; 218,789,994 shares issued and 193,150,532 shares outstanding at March 31, 2012	194	193
Additional paid-in capital	1,269,607	1,268,907
Retained earnings	1,510,326	1,499,365
Accumulated other comprehensive (loss) income	2,963	3,101
Common stock held in treasury: 25,107,727 shares at June 30, 2012; 25,639,462 shares at March 31, 2012	(765,100)	(780,893)
Total stockholders' equity	2,017,990	1,990,673
Total liabilities and stockholders' equity	$ 3,144,840	$ 3,083,776