CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011
ASSETS
Cash and cash equivalents	$ 605,725	$ 703,924
Short-term investments	696,548	539,572
Accounts receivable, net	149,277	181,202
Inventories	217,853	180,800
Prepaid expenses	23,706	22,234
Deferred tax assets	87,337	88,822
Other current assets	49,634	58,429
Total current assets	1,830,080	1,774,983
Property, plant and equipment, net	533,652	540,513
Long-term investments	468,086	464,838
Goodwill	76,098	76,018
Intangible assets, net	75,051	77,929
Other assets	38,184	33,777
Total assets	3,021,151	2,968,058
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	40,039	68,433
Accrued liabilities	92,741	131,839
Deferred income on shipments to distributors	115,786	140,044
Total current liabilities	248,566	340,316
Junior convertible debentures	353,341	347,334
Long-term income tax payable	71,386	58,125
Deferred tax liability	397,709	399,527
Other long-term liabilities	8,844	10,318
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 192,053,849 shares outstanding at December 31, 2011; 218,789,994 shares issued and 189,541,707 shares outstanding at March 31, 2011	192	190
Additional paid-in capital	1,270,343	1,268,128
Retained earnings	1,485,989	1,428,838
Accumulated other comprehensive (loss) income	(1,755)	3,357
Common stock held in treasury: 26,736,145 shares at December 31, 2011; 29,248,287 shares at March 31, 2011	(813,464)	(888,075)
Total stockholders' equity	1,941,305	1,812,438
Total liabilities and stockholders' equity	$ 3,021,151	$ 2,968,058