Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans - Stock Option Awards (Detail)

v2.4.0.8
Stock Compensation Plans - Stock Option Awards (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Outstanding, Shares Under Option, Beginning Balance 146 114 159
Granted, Shares Under Option   49 9
Exercised, Shares Under Option (52) (13) (50)
Expired, Shares Under Option     (3)
Forfeited, Shares Under Option (1) (4) (1)
Outstanding, Shares Under Option, Ending Balance 93 146 114
Outstanding, Weighted Average Exercise Price, Beginning Balance $ 16.04 $ 13.90 $ 11.87
Vested or expected to vest, Shares Under Option 90    
Granted, Weighted Average Exercise Price   $ 18.65 $ 21.19
Exercisable, Shares Under Option 62    
Exercised, Weighted Average Exercise Price $ 11.31 $ 6.35 $ 7.72
Expired, Weighted Average Exercise Price     $ 30.88
Forfeited, Weighted Average Exercise Price $ 19.15 $ 18.65 $ 18.09
Outstanding, Weighted Average Exercise Price, Ending Balance $ 18.60 $ 16.04 $ 13.90
Vested or expected to vest, Weighted Average Exercise Price $ 18.58    
Exercisable, Weighted Average Exercise Price $ 19.00    
Outstanding, Weighted Average Remaining Contractual Term, Ending Balance 6 years 4 months 6 days    
Vested or expected to vest, Weighted Average Remaining Contractual Term 6 years 3 months 15 days    
Exercisable, Weighted Average Remaining Contractual Term 5 years 5 months 19 days    
Outstanding, Aggregate Intrinsic Value, Ending Balance $ 1,261    
Vested or expected to vest, Aggregate Intrinsic Value 1,215    
Exercisable, Aggregate Intrinsic Value $ 852