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Earnings Per Share (Details Textual)
3 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share [Abstract]        
Options excluded from the computation of diluted net income per share 1,737 1,397 1,615 1,306