Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Current assets:
Allowance, accounts receivable	$ 6,546	$ 7,078
Stockholders' equity:
Preferred stock, par value	$ 0.003	$ 0.003
Preferred stock, shares authorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value	$ 0.001455	$ 0.001455
Common stock, shares authorized	150,000,000us-gaap_CommonStockSharesAuthorized	150,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	72,960,000us-gaap_CommonStockSharesIssued	72,960,000us-gaap_CommonStockSharesIssued
Treasury stock, shares	7,653,000us-gaap_TreasuryStockShares	7,397,000us-gaap_TreasuryStockShares
Treasury stock held for deferred compensation, shares	191,000	198,000

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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