Long-term Debt - Principal Payments (Table) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Twelve month periods ending
Current portion of long term debt	$ 7,532	$ 0
Long term debt, net	751,898	743,719
Long term debt
Twelve month periods ending
June 30, 2018	7,532
June 30, 2019	267,630
June 30, 2020	210,064
June 30, 2021	135,246
June 30, 2022	83,078
June 30, 2023 and thereafter	64,143
Total Long term debt	767,693
Unamortized Deferred financing fees	8,263	$ 9,214
Total Long term debt, net	759,430
Current portion of long term debt	7,532
Long term debt, net	$ 751,898

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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-Section S99
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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Carrying value as of the balance sheet date of current portion of long-term loans payable to bank due within one year or the operating cycle if longer.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the operating cycle if longer, excluding current portion.

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