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Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Apr. 02, 2014
Dec. 31, 2013
Nov. 15, 2013
Mar. 20, 2013
Debt [Line Items]            
Debt instrument, unamortized premium $ 5,838 $ 7,017        
Note payable and other bank loans 0 0        
Debt, long-term and short-term, combined amount, total 740,838 742,017        
Obligations under capital leases 670 1,110        
Debt and capital lease obligations 741,508 743,127        
Less: Current portion 470 534        
Long-term debt, less current portion 741,038 742,593        
6.75% Notes            
Debt [Line Items]            
Senior notes $ 735,000 $ 735,000        
Stated interest rate 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%
Wells Fargo Capital Finance, Llc [Member] | Revolving Credit Facility [Member]            
Debt [Line Items]            
Long-term Line of Credit $ 0 $ 0