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Earnings (Loss) Per Share - Components of Denominator for Basic Earnings (Loss) Per Common Share and Diluted Earnings (Loss) Per Common Share (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Options excluded from the computation of diluted earnings per share	109,500	732,000	271,000	740,000

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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