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Schedule of Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Current portion of debt $ 12,656 $ 11,250
Long-term debt 330,042 358,915
Secured Debt [Member]    
Debt Instrument [Line Items]    
Total debt 343,535 371,212
Current portion of debt 12,656 11,250
Long-term debt 330,042 358,915
USD Denominated Term Loan [Member]    
Debt Instrument [Line Items]    
USD denominated term loan 210,938 219,375
Deferred Finance Costs, Noncurrent, Net 837 1,047
Line of Credit [Member]    
Debt Instrument [Line Items]    
Multicurrency revolving line of credit 132,597 151,837
Deferred Finance Costs, Noncurrent, Net $ 2,596 $ 3,128