Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense Stock-Based Compensation Expense - Unvested Shares (Details)

v3.4.0.3
Stock-Based Compensation Expense Stock-Based Compensation Expense - Unvested Shares (Details) - Stock Options [Member] - $ / shares
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options outstanding, beginning of period (in shares) 465,042.000 558,466 1,132,780  
Forfeited (in shares) (2,260) (5,374) (7,827)  
Options outstanding, end of period (in shares) 433,726.000 465,042.000 558,466  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Options outstanding, weighted average exercise price (in dollars per share) $ 8.07 $ 8.12 $ 7.96 $ 6.98
Forfeited, weighted average exercise price (in dollars per share) $ 17.10 $ 12.04 $ 15.73  
Unvested [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options outstanding, beginning of period (in shares) 73,449 105,398 146,226  
Vested (in shares) (30,379) (26,575) (33,001)  
Forfeited (in shares) (2,260) (5,374) (7,827)  
Options outstanding, end of period (in shares) 40,810 73,449 105,398  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Options outstanding, weighted average exercise price (in dollars per share) $ 7.39 $ 7.19 $ 8.33 $ 8.34
Vested, weighted average exercise price (in dollars per share) 6.93 6.94 6.92  
Forfeited, weighted average exercise price (in dollars per share) $ 7.53 $ 6.14 $ 8.32