Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Details)

v3.3.1.900
Fair Value Measurements - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
May. 31, 2015
Dec. 31, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Revolving bank credit facility     $ 447,000
8.50% Senior Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Debt instrument interest rate 8.50%   8.50%
Carrying value of senior notes $ 900,000   $ 900,000
9.00% Term Loan due 2020      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Debt instrument interest rate 9.00% 9.00%  
Carrying value of senior notes $ 300,000    
Fair Value, Inputs, Level 2      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Revolving bank credit facility $ 0   $ 447,000
Fair Value, Inputs, Level 2 | 8.50% Senior Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Debt instrument interest rate 8.50%    
Fair Value, Inputs, Level 2 | 9.00% Term Loan due 2020      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Debt instrument interest rate 9.00%