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Debt - Long Term Debt (Parenthetical) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jul. 27, 2016
Dec. 31, 2015
Jan. 29, 2015
Nov. 09, 2012
6.875 % Due 2020 [Member]          
Long term Debt [Abstract]          
Interest rate 6.875%        
6.125% Due 2022 [Member]          
Long term Debt [Abstract]          
Interest rate 6.125%        
Notes Payable to Banks [Member] | Term Loans [Member]          
Long term Debt [Abstract]          
Debt financing costs and discount $ 6,592   $ 8,715    
Senior Subordinated Notes [Member] | 6.875 % Due 2020 [Member]          
Long term Debt [Abstract]          
Debt financing costs and discount $ 4,295   $ 5,223    
Interest rate 6.875%   6.875%   6.875%
Senior Subordinated Notes [Member] | 6.125% Due 2022 [Member]          
Long term Debt [Abstract]          
Debt financing costs and discount $ 2,402   $ 2,786    
Interest rate 6.125%   6.125% 6.125%  
Senior Subordinated Notes [Member] | 5.625 % Due 2024 [Member]          
Long term Debt [Abstract]          
Debt financing costs and discount $ 15,090        
Interest rate 5.625% 5.625%