Long-Term Debt - Annual Loan Payments (Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
2017	$ 40,534
2018	119,401
2019	275,384
2020	156,897
2021	1,313
Thereafter	11,483
Total	605,012	$ 571,616
2007 Credit Facility (i)
Debt Instrument [Line Items]
2017	12,975
2018	51,900
2019	121,100
2020	0
2021	0
Thereafter	0
Total	185,975
2008 Credit Facility (ii)
Debt Instrument [Line Items]
2017	9,205
2018	36,819
2019	135,617
2020	0
2021	0
Thereafter	0
Total	181,641
2011 Credit Facility (iii)
Debt Instrument [Line Items]
2017	1,000
2018	13,000
2019	0
2020	0
2021	0
Thereafter	0
Total	14,000
2013 Credit Facility (iv)
Debt Instrument [Line Items]
2017	17,354
2018	17,354
2019	17,354
2020	155,584
2021	0
Thereafter	0
Total	207,646
2015 Credit Facility (v)
Debt Instrument [Line Items]
2017	0
2018	328
2019	1,313
2020	1,313
2021	1,313
Thereafter	11,483
Total	$ 15,750	$ 0

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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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 after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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