Fair Value (Tables)

12 Months Ended

Jan. 31, 2013

Financial Assets Measured at Fair Value on Recurring Basis

The Company’s financial assets that are accounted for at fair value on a recurring basis are presented in the table below:


	Marketable Securities Fair Value as of January 31, 2013
	Level 1		Level 2		Level 3		Total
Assets:
Corporate bonds	$	152,775	$	—	$	—	$	152,775
Municipal and pre-refunded municipal bonds		—		116,364		—		116,364
Certificates of deposit		—		43,235		—		43,235
Treasury bills		41,105		—		—		41,105
Commercial paper		—		10,781		—		10,781
Federal government agencies		9,481		—		—		9,481
Auction rate securities		—		—		4,330		4,330

	$	203,361	$	170,380	$	4,330	$	378,071


	Marketable Securities Fair Value as of January 31, 2012
		Level 1		Level 2		Level 3		Total
Assets:
Corporate bonds	$	95,935	$	—	$	—	$	95,935
Municipal and pre-refunded municipal bonds		—		60,234		—		60,234
Certificates of deposit		—		12,194		—		12,194
Treasury bills		14,988		—		—		14,988
Commercial paper		—		3,592		—		3,592
Federal government agencies		9,627		—		—		9,627
Auction rate securities		—		—		20,197		20,197

	$	120,550	$	76,020	$	20,197	$	216,767

Reconciliation of Beginning and Ending Auction Rate Securities Balances

Below is a reconciliation of the beginning and ending ARS securities balances that the Company valued using a Level 3 valuation for the fiscal years ended January 31, 2013 and 2012.


	Fiscal Year Ended January 31, 2013			Fiscal Year Ended January 31, 2012
Balance at beginning of period	$	20,197		$	29,462
Total gains realized/unrealized:
Included in earnings		—			—
Included in other comprehensive income		2,183			1,010
Settlements		(18,050	)		(10,275	)
Transfers in and/or out of Level 3		—			—

Balance at end of period	$	4,330		$	20,197

Unrealized losses included in accumulated other comprehensive loss related to assets still held at reporting date	$	(595	)	$	(2,778	)
Total gains for the period included in earnings attributable to the change in unrealized gains or losses related to assets still held at reporting date	$	—		$	—

- 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).

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- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes 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 (loss) 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, issues, 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 liability.

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