Fair Value Measurements (Tables)

12 Months Ended

Jul. 31, 2013

Fair Value Disclosures [Abstract]

Summary of Assets Measured at Fair Value on Recurring Basis

The following table presents the balance of assets at July 31, 2013 measured at fair value on a recurring basis:

(in thousands)	Level 1		Level 2		Level 3		Total
Available-for-sale securities	$	—	$	9,684	$	—	$	9,684

Summary of Change in Company's Assets Measured at Fair Value on Recurring Basis

The following table summarizes, for the year ended July 31, 2011, the change in the balance of the Company’s assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

(in thousands)
Balance, beginning of year	$	218
Total gains (losses) (realized or unrealized):
Included in earnings in “Other income (expense), net”		5,379
Included in other comprehensive income		131
Purchases, sales, issuances and settlements:
Sales		(5,728	)
Transfers in (out) of Level 3		—
Balance, end of year	$	—
The amount of total gains or losses for the year included in earnings in “Other income (expense), net” attributable to the change in unrealized gains or losses relating to assets or liabilities still held at the end of the year	$	—