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Debt Components (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Total Debt $ 1,250,767 $ 1,292,144
Less: current portion (5,865) (5,406)
Long-term debt 1,244,902 1,286,738
Term Debt [Member]    
Debt Instrument [Line Items]    
Total Debt 669,531 678,286
Trade receivables financing arrangement [Member]    
Debt Instrument [Line Items]    
Total Debt 62,193 63,399
Revolving credit facilities and other [Member]    
Debt Instrument [Line Items]    
Total Debt $ 519,043 $ 550,459