Commitments and Contingencies - Contractual Obligations (Table) (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Lease commitments
2018	$ 52,005
2019	(8,262)
2020	(8,185)
2021	(8,113)
2022	(8,296)
2023 and thereafter	(61,491)
Total	(42,342)
Future, minimum, non-cancellable charter revenue (1)
Lease commitments
2018	62,751
2019	0
2020	0
2021	0
2022	0
2023 and thereafter	0
Total	62,751
Future, minimum, charter-in hire payments (2)
Lease commitments
2018	(3,486)
2019	0
2020	0
2021	0
2022	0
2023 and thereafter	0
Total	(3,486)
Office rent
Lease commitments
2018	(353)
2019	(279)
2020	(274)
2021	(276)
2022	(281)
2023 and thereafter	(288)
Total	(1,751)
Bareboat commitments charter hire (3)
Lease commitments
2018	(6,907)
2019	(7,983)
2020	(7,911)
2021	(7,837)
2022	(8,015)
2023 and thereafter	(61,203)
Total	$ (99,856)

Amount of minimum lease payments for capital leases.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

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Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

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