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Debt (5.875% Senior Notes Due 2024) (Details) - USD ($)
12 Months Ended
Sep. 25, 2014
Dec. 31, 2016
Apr. 18, 2016
Dec. 31, 2015
Mar. 19, 2013
Feb. 10, 2011
Debt Instrument [Line Items]            
Capitalized loan costs   $ 48,900,000   $ 50,500,000    
5.875% Senior Notes due 2024            
Debt Instrument [Line Items]            
Capitalized loan costs $ 4,600,000          
Senior Notes | 5.125% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, face amount         $ 300,000,000.0  
Stated interest rate   5.125%   5.125% 5.125%  
Redemption price percentage   105.125%        
Capitalized loan costs   $ 6,800,000        
Senior Notes | 5.125% Senior Notes | Redemption, Period 2019            
Debt Instrument [Line Items]            
Redemption price percentage   101.708%        
Senior Notes | 5.125% Senior Notes | Redemption, Period 2020            
Debt Instrument [Line Items]            
Redemption price percentage   100.854%        
Senior Notes | 5.125% Senior Notes | Redemption, Period 2021            
Debt Instrument [Line Items]            
Redemption price percentage   100.00%        
Senior Notes | 5.875% Senior Notes due 2024            
Debt Instrument [Line Items]            
Debt instrument, face amount $ 250,000,000.0          
Stated interest rate 5.875% 5.875%   5.875%    
Violation or event of default, interest payment failure, term 30 days          
Violation or event of default, interest payment failure, maximum excess proceeds on sale of asset $ 25,000,000          
Violation or event of default, interest payment failure, failure to comply with other indenture agreements, term 60 days          
Senior Notes | 5.875% Senior Notes due 2024 | Redemption, Period 2016            
Debt Instrument [Line Items]            
Redemption price percentage 105.875%          
Percentage of principal amount redeemed 35.00%          
Senior Notes | 5.875% Senior Notes due 2024 | Redemption, Period 2017            
Debt Instrument [Line Items]            
Redemption price percentage 100.00%          
Senior Notes | 5.875% Senior Notes due 2024 | Redemption, Period 2019            
Debt Instrument [Line Items]            
Redemption price percentage 102.938%          
Senior Notes | 5.875% Senior Notes due 2024 | Redemption, Period 2020            
Debt Instrument [Line Items]            
Redemption price percentage 101.958%          
Senior Notes | 5.875% Senior Notes due 2024 | Redemption, Period 2021            
Debt Instrument [Line Items]            
Redemption price percentage 100.979%          
Senior Notes | 5.875% Senior Notes due 2024 | 2022 and thereafter            
Debt Instrument [Line Items]            
Redemption price percentage 100.00%          
Senior Notes | 6.625% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, face amount           $ 300,000,000
Stated interest rate 6.625% 6.625% 6.625% 6.625% 6.00% 6.625%