| 
           Debt and Capital Lease Obligations - Capital Lease (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | ||
|---|---|---|---|
| 
           Dec. 31, 2014 
         | 
        
           Dec. 31, 2013 
         | 
        
           Dec. 31, 2012 
         | 
      |
| Capital Leases, Future Minimum Payments Due [Abstract] | |||
| 2015 | $ 349us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent | ||
| 2016 | 347us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears | ||
| 2017 | 347us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears | ||
| 2018 | 347us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears | ||
| 2019 | 320us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears | ||
| Thereafter | 55us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter | ||
| Total | 1,765us-gaap_CapitalLeasesFutureMinimumPaymentsDue | ||
| Less amounts representing interest | 214us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments | ||
| Present value of net minimum lease payments (including current portion of $276) | 1,551us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments | ||
| Interest Paid | 495us-gaap_InterestPaid | 482us-gaap_InterestPaid | 365us-gaap_InterestPaid | 
| Equipment [Member] | |||
| Capital Lease Obligations [Abstract] | |||
| Equipment | 
793us-gaap_CapitalLeasedAssetsGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        
685us-gaap_CapitalLeasedAssetsGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        |
| Accumulated amortization | 
(253)us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        
(680)us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        |
| Capital leases, net | 
$ 540us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        
$ 5us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember  | 
        |
| X | ||||||||||
| 
             
- Definition 
          Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
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- Definition 
          The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount necessary to reduce net minimum lease payments to present value for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The amount of cash paid for interest during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
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