Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 526,189	$ 788,822	[1]
Short-term investments	1,216,938	1,128,805	[1]
Accounts receivable, net	257,944	214,965	[1]
Inventories	193,316	204,866	[1]
Deferred tax assets	60,192	64,822	[1]
Prepaid expenses and other current assets	47,601	48,029	[1]
Total current assets	2,302,180	2,450,309	[1]
Property, plant and equipment, at cost:	794,389	788,422	[1]
Accumulated depreciation and amortization	(405,668)	(393,440)	[1]
Net property, plant and equipment	388,721	394,982	[1]
Long-term investments	1,399,684	1,209,228	[1]
Goodwill	149,538	149,538	[1]
Acquisition-related intangibles, net	34,184	36,332	[1]
Other assets	218,924	223,733	[1]
Total Assets	4,493,231	4,464,122	[1]
Current liabilities:
Accounts payable	101,678	78,613	[1]
Accrued payroll and related liabilities	113,842	121,309	[1]
Deferred income on shipments to distributors	56,700	67,002	[1]
Other accrued liabilities	87,940	75,852	[1]
Total current liabilities	360,160	342,776	[1]
Convertible debentures	911,135	906,569	[1]
Deferred tax liabilities	477,622	463,045	[1]
Long-term income taxes payable	15,296	14,479	[1]
Other long-term liabilities	24,938	29,568	[1]
Commitments and contingencies			[1]
Stockholders' equity:
Preferred stock, $.01 par value (none issued)	0	0	[1]
Common stock, $.01 par value	2,612	2,636	[1]
Additional paid-in capital	1,150,525	1,195,458	[1]
Retained earnings	1,546,026	1,502,327	[1]
Accumulated other comprehensive income	4,917	7,264	[1]
Total stockholders' equity	2,704,080	2,707,685	[1]
Total Liabilities and Stockholders' Equity	$ 4,493,231	$ 4,464,122	[1]

[1] Derived from audited financial statements