XML 89 R75.htm IDEA: XBRL DOCUMENT v3.5.0.1
Share-based Payments, Stock Option Activity (Details) - USD ($)
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Outstanding options, shares (in shares) 984,066    
Outstanding options, weighted average exercise price (in dollars per share) $ 11.98    
Outstanding options, weighted average remaining life 6 years 3 months 14 days    
Outstanding options, aggregate intrinsic value $ 25,585,000    
Exercisable options, shares (in shares) 720,512    
Exercisable options, weighted average exercise price (in dollars per share) $ 8.43    
Exercisable options, aggregate intrinsic value $ 21,291,000    
$4.17 to $6.25 [Member]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of exercise price, lower range limit (in dollars per share) $ 4.17    
Range of exercise price, upper range limit (in dollars per share) $ 6.25    
Outstanding options, shares (in shares) 80,000    
Outstanding options, weighted average exercise price (in dollars per share) $ 5.22    
Outstanding options, weighted average remaining life 3 years 11 days    
Outstanding options, aggregate intrinsic value $ 2,621,000    
Exercisable options, shares (in shares) 80,000    
Exercisable options, weighted average exercise price (in dollars per share) $ 5.22    
Exercisable options, aggregate intrinsic value $ 2,621,000    
$6.46 to $7.43 [Member]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of exercise price, lower range limit (in dollars per share) $ 6.46    
Range of exercise price, upper range limit (in dollars per share) $ 7.43    
Outstanding options, shares (in shares) 370,167    
Outstanding options, weighted average exercise price (in dollars per share) $ 6.51    
Outstanding options, weighted average remaining life 6 years 6 months 22 days    
Outstanding options, aggregate intrinsic value $ 11,650,000    
Exercisable options, shares (in shares) 370,167    
Exercisable options, weighted average exercise price (in dollars per share) $ 6.51    
Exercisable options, aggregate intrinsic value $ 11,650,000    
$9.32 to $9.90 [Member]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of exercise price, lower range limit (in dollars per share) $ 9.32    
Range of exercise price, upper range limit (in dollars per share) $ 9.90    
Outstanding options, shares (in shares) 208,399    
Outstanding options, weighted average exercise price (in dollars per share) $ 9.33    
Outstanding options, weighted average remaining life 7 years 4 months 24 days    
Outstanding options, aggregate intrinsic value $ 5,971,000    
Exercisable options, shares (in shares) 122,933    
Exercisable options, weighted average exercise price (in dollars per share) $ 9.33    
Exercisable options, aggregate intrinsic value $ 3,522,000    
$10.01 to $19.94 [Member]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of exercise price, lower range limit (in dollars per share) $ 10.01    
Range of exercise price, upper range limit (in dollars per share) $ 19.94    
Outstanding options, shares (in shares) 142,016    
Outstanding options, weighted average exercise price (in dollars per share) $ 13.49    
Outstanding options, weighted average remaining life 2 years 4 months 20 days    
Outstanding options, aggregate intrinsic value $ 3,478,000    
Exercisable options, shares (in shares) 125,350    
Exercisable options, weighted average exercise price (in dollars per share) $ 12.69    
Exercisable options, aggregate intrinsic value $ 3,170,000    
$22.93 to $34.17 [Member]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of exercise price, lower range limit (in dollars per share) $ 22.93    
Range of exercise price, upper range limit (in dollars per share) $ 34.17    
Outstanding options, shares (in shares) 183,484    
Outstanding options, weighted average exercise price (in dollars per share) $ 27.82    
Outstanding options, weighted average remaining life 8 years 11 months 5 days    
Outstanding options, aggregate intrinsic value $ 1,865,000    
Exercisable options, shares (in shares) 22,062    
Exercisable options, weighted average exercise price (in dollars per share) $ 23.07    
Exercisable options, aggregate intrinsic value $ 328,000    
Stock Options [Member]      
Number of Shares [Roll Forward]      
Outstanding at beginning of period (in shares) 1,389,254    
Granted (in shares) 111,222    
Exercised (in shares) (510,637)    
Cancelled (in shares) (5,773)    
Outstanding at end of period (in shares) 984,066 1,389,254  
Weighted Average Exercise Price [Roll Forward]      
Outstanding at beginning of period (in dollars per share) $ 9.97    
Granted (in dollars per share) 31.16    
Exercised (in dollars per share) 10.56    
Cancelled (in dollars per share) 23.22    
Outstanding at end of period (in dollars per share) $ 11.98 $ 9.97  
Pre-tax intrinsic value of options exercised $ 14,002,000 $ 1,955,000 $ 12,593,000
Fair value of vested stock options $ 905,000 $ 978,000 $ 459,000
Closing stock price (in dollars per share) $ 37.98    
Total unrecognized compensation expense, options $ 1,835,000    
Weighted average vesting period over which compensation expense is expected to be recognized 1 year 4 months 24 days