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Debt (Details Textual) (USD $)
Jun. 27, 2014
Dec. 31, 2013
May 14, 2014
Term A-1 Facility [Member]
Increase to Borrowing Capacity Under the Deutsche Bank Credit Agreement     $ 150,000,000
Long-term Debt 1,871,990,000 1,487,091,000 558,700,000
Debt discount 15,100,000    
Deferred Finance Costs, Net 11,500,000    
Long-term Debt, Weighted Average Interest Rate 1.69%    
Line of Credit Facility, Remaining Borrowing Capacity 319,900,000    
DB Letter of Credit Subfacility, Remaining Borrowing Capacity 199,900,000    
Letters of Credit, Maximum Capacity 699,700,000    
Letters of Credit, Amount Outstanding $ 466,900,000