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Earnings Per Share - Additional Information (Detail)	3 Months Ended
Earnings Per Share - Additional Information (Detail)	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities and unvested restricted shares outstanding excluded from computation of earnings per share amount	51,622	68,896

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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