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Investments And Fair Value Measurements (Tables)

6 Months Ended

Jan. 31, 2012

Investments And Fair Value Measurements [Abstract]

Financial Assets Measured At Fair Value On Recurring Basis


	January 31, 2012				July 31, 2011
	Cash and Cash Equivalents		Auction Rate Securities		Cash and Cash Equivalents		Auction Rate Securities
Levels of Input:

Level 1	$	156,206	$	–	$	215,435	$	–
Level 2		–		–		–		–
Level 3		–		1,619		–		2,042

	$	156,206	$	1,619	$	215,435	$	2,042

Assets Measured At Fair Value Using Significant Unobservable Inputs


	Fair Value Measurements at Reporting Date Using Significant Unobservable Inputs (Level 3)
Balances at August 1, 2011	$	2,042
Net change in other comprehensive income		(23)
Net loss included in earnings		–
Purchases		–
Sales/Maturities		(400)

Balances at January 31, 2012	$	1,619

- 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.

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