| 
           Income Taxes - Provision for Income Taxes (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Sep. 30, 2014 
         | 
        
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2014 
         | 
        
           Sep. 30, 2013 
         | 
      |
| Income Tax Disclosure [Abstract] | ||||
| Income tax expense | $ 1,971 | $ 1,809 | $ 2,147 | $ 2,751 | 
| X | ||||||||||
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- Details 
          
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| X | ||||||||||
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- Definition 
          Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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