Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Fair Value) (Details)

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Fair Value Measurements (Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Principal Components $ 102,500 $ 70,481
Derivative Assets    
Derivative Assets, Current 4,842 60
Derivative Assets 6,011 60
Liabilities    
Derivative Liabilities, Current (465) (1,036)
Derivative Liabilities (1,330) (1,108)
Fair Value, Net Asset (Liability) 4,681 (1,048)
Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 102,500 75,748
Fair Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 102,500 72,299
Level 2 [Member]
    
Derivative Assets    
Derivative Assets 6,011 60
Liabilities    
Derivative Liabilities (1,330) (1,108)
Fair Value, Net Asset (Liability) 4,681 (1,048)
Senior Secured Revolving Credit Facility [Member] | Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 20,000 22,000
Senior Secured Revolving Credit Facility [Member] | Fair Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 20,000 22,000
Secured second lien term loan [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Principal Components 82,500  
Secured second lien term loan [Member] | Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 82,500  
Secured second lien term loan [Member] | Fair Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 82,500  
13% Senior Notes due 2016 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Principal Components   48,481
Deferred credit   5,267
13% Senior Notes due 2016 [Member] | Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
13% Senior Notes due 2016   53,748 [1]
13% Senior Notes due 2016 [Member] | Fair Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
13% Senior Notes due 2016   50,299 [1]
Current assets - Fair market value of derivatives [Member]
    
Derivative Assets    
Derivative Assets, Current 4,842 60
Liabilities    
Derivative Liabilities, Current (465)  
Current assets - Fair market value of derivatives [Member] | Level 2 [Member]
    
Derivative Assets    
Derivative Assets, Current 4,842 60
Liabilities    
Derivative Liabilities, Current (465)  
Noncurrent assets - Other assets, net [Member]
    
Derivative Assets    
Derivative Assets, Noncurrent 1,169  
Noncurrent assets - Other assets, net [Member] | Level 2 [Member]
    
Derivative Assets    
Derivative Assets, Noncurrent 1,169  
Current liabilities - Fair market value of derivatives [Member]
    
Liabilities    
Derivative Liabilities, Current   (1,036)
Current liabilities - Fair market value of derivatives [Member] | Level 2 [Member]
    
Liabilities    
Derivative Liabilities, Current   (1,036)
Other long-term liabilities [Member]
    
Liabilities    
Derivative Liabilities, Noncurrent (865) (72)
Other long-term liabilities [Member] | Level 2 [Member]
    
Liabilities    
Derivative Liabilities, Noncurrent $ (865) $ (72)
[1] Fair value is calculated only in relation to the $48,481 principal outstanding of the Senior Notes at December 31, 2013 and excludes the remaining $5,267 deferred credit. The fair value of the Senior Notes, which is valued using Level 2 inputs, is based upon estimates provided by an independent investment banking firm. See Note 4 for additional information.