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Debt - First Lien Credit Facility (Details) - Jefferies Finance LLC and Goldman Sachs Bank USA - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jul. 01, 2013
First Lien Credit Facility      
Line of Credit Facility [Line Items]      
Term credit agreement     $ 535,000,000
Principal payments $ 235,000,000 $ 300,000,000  
Cash held in collateral account   $ 117,300,000  
Writedown of capitalized debt costs $ 9,600,000    
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Revolving credit facility amount     $ 50,000,000