| 
           Basis of Presentation (Details 1) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Dec. 31, 2012 
         | 
        
           Dec. 31, 2011 
         | 
        
           Dec. 31, 2012 
         | 
        
           Dec. 31, 2011 
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      |
| ConferencePlus revenue and income before income taxes reported in discontinued operations | ||||
| Revenue | $ 0 | $ 10,072 | $ 0 | $ 31,732 | 
| Income before income taxes | $ (1,515) | $ 563 | $ (1,515) | $ 3,594 | 
| X | ||||||||||
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- Definition 
          Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
          
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