Quarterly report pursuant to sections 13 or 15(d)

Potentially Dilutive Shares (Detail)

v2.4.0.6
Potentially Dilutive Shares (Detail)
3 Months Ended 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share [Line Items]        
Potentially dilutive shares 26,223 28,305 27,099 27,491