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
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
13% Senior Notes, principal $ 166,500 $ 70,481
Derivative Assets    
Derivative Assets 851 60
Liabilities    
Derivative Liabilities, Current (5,306) (1,036)
Derivative Liabilities (6,577) (1,108)
Fair Value, Net Asset (Liability) (5,726) (1,048)
Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 166,500 75,748
Fair Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 166,500 72,299
Level 2 [Member]
    
Derivative Assets    
Derivative Assets 851 60
Liabilities    
Derivative Liabilities (6,577) (1,108)
Fair Value, Net Asset (Liability) (5,726) (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 84,000 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 84,000 22,000
Second Lien Term Loan Facility [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
13% Senior Notes, principal 82,500  
Second Lien Term Loan Facility [Member] | Carrying Value [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 82,500  
Second Lien Term Loan Facility [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]    
13% Senior Notes, principal   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   60
Liabilities    
Derivative Liabilities, Current (5,306)  
Current assets - Fair market value of derivatives [Member] | Level 2 [Member]
    
Derivative Assets    
Derivative Assets, Current   60
Liabilities    
Derivative Liabilities, Current (5,306)  
Noncurrent assets - Other assets, net [Member]
    
Derivative Assets    
Derivative Assets, Noncurrent 851  
Noncurrent assets - Other assets, net [Member] | Level 2 [Member]
    
Derivative Assets    
Derivative Assets, Noncurrent 851  
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 (1,271) (72)
Other long-term liabilities [Member] | Level 2 [Member]
    
Liabilities    
Derivative Liabilities, Noncurrent $ (1,271) $ (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.