Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Allowance for doubtful accounts receivable, current	$ 4,217	$ 5,469
Common stock, no par value	$ 0us-gaap_CommonStockNoParValue	$ 0us-gaap_CommonStockNoParValue
Common stock, shares authorized	300,000us-gaap_CommonStockSharesAuthorized	300,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	115,790us-gaap_CommonStockSharesIssued	115,722us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	115,790us-gaap_CommonStockSharesOutstanding	115,722us-gaap_CommonStockSharesOutstanding

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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