Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Summary of Fair Value of Financial Instruments at Carrying and Fair Value) (Details)

v3.6.0.2
Fair Value Measurements (Summary of Fair Value of Financial Instruments at Carrying and Fair Value) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 390,219 $ 328,565
Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 412,000 328,565
Senior Secured Revolving Credit Facility [Member] | Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Credit facility [1]   40,000
Senior Secured Revolving Credit Facility [Member] | Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Credit facility [1]   40,000
Secured Second Lien Term Loan [Member] | Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Second Lien Loan [1]   288,565
Secured Second Lien Term Loan [Member] | Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Second Lien Loan [1]   $ 288,565
6.125% senior unsecured notes due 2024 [Member] | Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
6.125% Senior Notes [2] 390,219  
6.125% senior unsecured notes due 2024 [Member] | Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
6.125% Senior Notes [2] $ 412,000  
[1] Floating-rate debt.
[2] The fair value was based upon Level 2 inputs. See Note 5 for additional information about the Company's 6.125% Senior Notes.