| 
           Stock-Based Compensation (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Jun. 30, 2013 
         | 
        
           Jun. 30, 2012 
         | 
      |
| Stock-based compensation expense | ||
| Stock-based compensation expense | $ 351 | $ 375 | 
| Income tax expense | 0 | 0 | 
| Total stock-based compensation expense after taxes | $ 351 | $ 375 | 
| X | ||||||||||
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- Definition 
          Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available. 
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| X | ||||||||||
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- Definition 
          The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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