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Common Stock Repurchases	9 Months Ended
Common Stock Repurchases	Aug. 31, 2015
Common Stock Repurchases [Abstract]
Common Stock Repurchases	Common Stock Repurchases We did not repurchase shares of our common stock during the three months ended August 31, 2015. Total repurchased and retired shares of our common stock during the nine months ended August 31, 2015 was 1.3 million shares for $32.9 million. In the three and nine months ended August 31, 2014, we repurchased and retired 0.7 million shares for $17.6 million and 2.3 million shares for $52.6 million, respectively. The shares were repurchased in both periods as part of our Board of Directors authorized $100.0 million share repurchase program, with $14.5 million remaining under the current authorization. In September 2015, our Board of Directors authorized a new $100.0 million share repurchase program, which increased the total authorization to $114.5 million. The timing and amount of any shares repurchased will be determined by management based on its evaluation of market conditions and other factors, and the Board of Directors may choose to suspend, expand or discontinue the repurchase program at any time.