Fair Value Measurements (Tables)

3 Months Ended

Sep. 30, 2011

Notes to Financial Statements [Abstract]

Assets measured at fair value on a recurring basis (in details)

Assets measured at fair value on a recurring basis at September 30, 2011 are as follows (amounts in thousands):



	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Money market fund deposits	$	318,820	$	—	$	—	$	318,820
Marketable equity securities	8,078		—		—		8,078
Corporate bonds & debt	—		718,974		4,625		723,599
Government agency bonds	—		346,342		—		346,342
Deposit accounts	—		356,309		—		356,309
Municipal bonds	—		10,577		—		10,577
Auction Rate Securities	—		—		11,693		11,693
Total assets measured at fair value	$	326,898	$	1,432,202	$	16,318	$	1,775,418

Assets measured at fair value on a recurring basis at March 31, 2011 are as follows (amounts in thousands):



	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Money market fund deposits	$	464,669	$	—	$	—	$	464,669
Marketable equity securities	26,861		—		—		26,861
Corporate bonds & debt	—		519,526		3,500		523,026
Government agency bonds	—		430,591		—		430,591
Deposit accounts	—		239,255		—		239,255
Municipal bonds	—		11,457		—		11,457
Auction Rate Securities	—		—		12,475		12,475
Total assets measured at fair value	$	491,530	$	1,200,829	$	15,975	$	1,708,334

Reconciliation for all assets measured at fair value on a recurring basis

The following tables present a reconciliation for all assets measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3) for the three and six months ended September 30, 2011, and the three and six months ended September 30, 2010 (amounts in thousands):



Three months ended September 30, 2011	Auction Rate Securities			Corporate Debt		Total Gains (Losses)
Balance at June 30, 2011	$	12,088		$	3,500	$	—
Total gains or losses (realized and unrealized):
Included in earnings	(395		)	—		(395		)
Included in other comprehensive income (loss)	—			—		—
Purchases, sales, issuances, and settlements, net	—			787		—
Transfer into Level 3	—			338		—
Transfer out of Level 3	—			—		—
Balance at September 30, 2011	$	11,693		$	4,625	$	(395	)



Six months ended September 30, 2011	Auction Rate Securities			Corporate Debt		Total Gains (Losses)
Balance at March 31, 2011	$	12,475		$	3,500	$	—
Total gains or losses (realized and unrealized):
Included in earnings	(782		)	—		(782		)
Included in other comprehensive income (loss)	—			—		—
Purchases, sales, issuances, and settlements, net	—			787		—
Transfer into Level 3	—			338		—
Transfer out of Level 3	—			—		—
Balance at September 30, 2011	$	11,693		$	4,625	$	(782	)



Three months ended September 30, 2010	Auction Rate Securities			Put Option on Auction Rate Securities			Corporate Debt		Total Gains (Losses)
Balance at June 30, 2010	$	20,396		$	453		$	3,500	$	—
Total gains or losses (realized and unrealized):
Included in earnings	65			(453		)	—		(388		)
Included in other comprehensive income (loss)	—			—			—		—
Purchases, sales, issuances, and settlements, net	(7,150		)	—			—		—
Transfer into Level 3	—			—			—		—
Transfer out of Level 3	—			—			—		—
Balance at September 30, 2010	$	13,311		$	—		$	3,500	$	(388	)



Six months ended September 30, 2010	Auction Rate Securities			Put Option on Auction Rate Securities			Corporate Debt		Total Gains (Losses)
Balance at March 31, 2010	$	37,237		$	1,814		$	—	$	—
Total gains or losses (realized and unrealized):
Included in earnings	974			(1,814		)	—		(840		)
Included in other comprehensive income (loss)	—			—			—		—
Purchases, sales, issuances, and settlements, net	(24,900		)	—			3,500		—
Transfer into Level 3	—			—			—		—
Transfer out of Level 3	—			—			—		—
Balance at September 30, 2010	$	13,311		$	—		$	3,500	$	(840	)

Fair Value, by Balance Sheet Grouping [Table Text Block]

Assets measured at fair value on a recurring basis are presented/classified on the condensed consolidated balance sheets at September 30, 2011 as follows (amounts in thousands):



	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Cash and cash equivalents	$	318,820	$	356,309	$	—	$	675,129
Short-term investments	3,786		736,523		—		740,309
Long-term investments	4,292		339,370		16,318		359,980
Total assets measured at fair value	$	326,898	$	1,432,202	$	16,318	$	1,775,418

Assets and liabilities measured at fair value on a recurring basis are presented/classified in the consolidated balance sheets at March 31, 2011 as follows (amounts in thousands):



	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Cash and cash equivalents	$	464,669	$	239,255	$	—	$	703,924
Short-term investments	16,553		523,019		—		539,572
Long-term investments	10,308		438,555		15,975		464,838
Total assets measured at fair value	$	491,530	$	1,200,829	$	15,975	$	1,708,334

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References+ Details

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References+ Details

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13467-108611

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph a, c(1), c(2), c(3), d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 19

-Subparagraph a, b, c(1), d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details