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Debt and Other Long-Term Liabilities (Schedule of Maturities of Long-term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]    
Total $ 1,008,125 $ 745,523
Credit Facility | Term Loans
   
Line of Credit Facility [Line Items]    
Remainder of 2014 1,875  
2015 9,376  
2016 13,126  
2017 15,000  
2018 18,750  
2019 89,998  
Total $ 148,125 $ 344,375