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Long-term Debt - Debt Table (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 29, 2015
Dec. 31, 2014
Debt Instrument [Line Items]      
Debt $ 463,950   $ 638,570
Current maturities, debt 10,460   23,400
Long-term debt 453,490   615,170
Credit Agreement [Member]      
Debt Instrument [Line Items]      
Debt 403,280   559,530
Receivables Facility and other [Member] [Member]      
Debt Instrument [Line Items]      
Debt $ 60,670   $ 79,040
term loan A facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Maturity Date Jun. 30, 2020 Oct. 16, 2018  
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 500,000 $ 575,000  
Debt Instrument, Maturity Date Jun. 30, 2020 Oct. 16, 2018  
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate [1] 1.625% 1.625%  
Senior Secured Term Loan A [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate [1] 1.625% 1.625%  
Debt Instrument, Face Amount $ 275,000 $ 450,000  
[1] The initial interest rate spread for the amended Credit Agreement is stated as 1.625%