| 
           Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parantheticals) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 6 Months Ended | 
|---|---|---|
| 
           Jun. 30, 2013 
         | 
        
           Jun. 30, 2013 
         | 
      |
| Statement Of Income And Comprehensive Income [Abstract] | ||
| Deferred income tax benefit | $ 657 | $ 797 | 
| Deferred income tax expense | $ 12 | $ 73 | 
| X | ||||||||||
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- Definition 
          Represents deferred income tax benefit. No definition available. 
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| X | ||||||||||
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- Definition 
          Represents deferred income tax expense. No definition available. 
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| X | ||||||||||
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- Details 
          
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