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Long-term Debt - Interest and finance costs (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Long-term Debt [Abstract]      
Interest on long term debt and capital leases $ 48,814 $ 40,449 $ 35,969
Less: Interest capitalized (2,423) (3,940) (12,079)
Reclassification adjustments of interest rate swap loss transferred to Interest and finance costs from Other Comprehensive Income (Note 18) 852 1,252 2,416
Amortization of debt issuance costs 2,660 2,855 2,732
Other bank and finance charges 555 601 623
Interest and finance costs $ 50,458 $ 41,217 $ 29,661