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Guarantor Subsidiaries Financial Information Additional Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]        
Cash and Cash Equivalents $ 61,266 $ 60,475 $ 426,646 $ 72,574
Long-term Debt 2,622,358 2,724,672    
Accounts and Notes Receivable:        
Trade 215,329 220,222    
Inventories $ 69,618 65,461    
Senior Notes 8 Percent Due April 2017 Par Value [Member]        
Condensed Financial Statements, Captions [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 8.25%      
Senior notes due April 2020 at 8.25%        
Condensed Financial Statements, Captions [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 6.375%      
Long-term Debt $ 74,470 74,470    
Senior Secured Notes Due March 2021 Par Value [Member] [Member] [Member]        
Condensed Financial Statements, Captions [Line Items]        
Long-term Debt $ 1,754,310 1,854,731    
Senior notes due March 2021 at 6.375%        
Condensed Financial Statements, Captions [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.875%      
Long-term Debt $ 20,611 20,611    
Senior Notes due April 2023 at 8.0% [Member]        
Condensed Financial Statements, Captions [Line Items]        
Long-term Debt $ 494,570 $ 494,344    
Senior Notes 8 Percent Due April 2023 Par Value [Member] [Member]        
Condensed Financial Statements, Captions [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 8.00%