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Long-Term Debt - Annual Loan Payments (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
2016 $ 12,957  
2017 36,137  
2018 114,676  
2019 269,674  
2020 138,172  
Total long-term debt 571,616 $ 577,915
2007 Credit Facility (i)    
Debt Instrument [Line Items]    
2016 0  
2017 12,975  
2018 51,900  
2019 121,100  
2020 0  
Total long-term debt 185,975  
2008 Credit Facility (ii)    
Debt Instrument [Line Items]    
2016 0  
2017 9,205  
2018 36,819  
2019 135,617  
2020 0  
Total long-term debt 181,641  
2011 Credit Facility (iii)    
Debt Instrument [Line Items]    
2016 0  
2017 1,000  
2018 13,000  
2019 0  
2020 0  
Total long-term debt 14,000  
2013 Credit Facility (iv)    
Debt Instrument [Line Items]    
2016 12,957  
2017 12,957  
2018 12,957  
2019 12,957  
2020 138,172  
Total long-term debt $ 190,000