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Stock-Based Compensation Performance-Based Restricted Stock Units (Details) - USD ($)
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Unearned compensation $ 463,000    
Compensation expense $ 2,874,000 $ 3,194,000 $ 3,222,000
Performance-Based Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of compensation granted for goals not reached 0.00%    
Percentage of compensation granted for maximum performance 200.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Balance at (in shares) 83,000 62,000 0
Granted (in shares) 30,000 22,000 64,000
Forfeited (in shares) (61,000) (1,000) (2,000)
Balance at (in shares) 52,000 83,000 62,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Balance at, Weighted Average Grant Date Fair Value (usd per share) $ 35.52 $ 38.50 $ 0.00
Granted, Weighted Average Grant Date Fair Value (usd per share) 10.11 27.20 38.50
Forfeited, Weighted Average Grant Date Fair Value (usd per share) 38.50 38.50 38.50
Balance at, Weighted Average Grant Date Fair Value (usd per share) $ 17.33 $ 35.52 $ 38.50
Shares expected to vest (in shares) 0    
Unearned compensation $ 0    
Compensation expense $ (202,000) $ 104,000 $ 98,000
Performance-Based Restricted Stock Units [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 2 years    
Performance-Based Restricted Stock Units [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years