Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2013

Text Block [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities of the Company measured at fair value on a recurring basis as of March 31, 2013 and September 30, 2012 are summarized as follows (in thousands):

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	12,451	$	12,451	$	—	$	—
Available-for-sale securities	85,453		37,594		47,859		—
Total Assets	$	97,904	$	50,045	$	47,859	$	—

			Fair Value Measurements at Reporting Date Using
Description	September 30, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	17,508	$	17,508	$	—	$	—
Available-for-sale securities	145,592		60,231		85,361		—
Foreign exchange contracts	10		—		10		—
Total Assets	$	163,110	$	77,739	$	85,371	$	—
Liabilities
Foreign exchange contracts	$	13	$	—	$	13	$	—