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Earnings Per Share ("EPS") (Narrative) (Details)	12 Months Ended
Earnings Per Share ("EPS") (Narrative) (Details)	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Equity-based compensation awards, excluded from computation of dilutive earnings per share	6,236	9,456	16,382

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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