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Fair Value Measurements - Interest Rate Swaps (Table) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Derivatives Fair Value [Line Items]
Notional Amount	$ 428,836
Interest Rate Swap 1
Derivatives Fair Value [Line Items]
Counterparty	Goldman Sachs
Inception	Oct. 01, 2014
Expiry	Apr. 01, 2018
Fixed Rate	1.7925%
Notional Amount	$ 93,180
Interest Rate Swap2
Derivatives Fair Value [Line Items]
Counterparty	Goldman Sachs
Inception	Oct. 01, 2014
Expiry	Apr. 01, 2018
Fixed Rate	1.8075%
Notional Amount	$ 93,180
Interest Rate Swap 3
Derivatives Fair Value [Line Items]
Counterparty	Goldman Sachs
Inception	Oct. 01, 2014
Expiry	Apr. 01, 2018
Fixed Rate	2.0675%
Notional Amount	$ 37,272
Interest Rate Swap 4
Derivatives Fair Value [Line Items]
Counterparty	Goldman Sachs
Inception	Oct. 01, 2014
Expiry	Apr. 01, 2018
Fixed Rate	1.845%
Notional Amount	$ 93,180
Interest Rate Swap 5
Derivatives Fair Value [Line Items]
Counterparty	Goldman Sachs
Inception	Oct. 01, 2014
Expiry	Apr. 01, 2018
Fixed Rate	1.8025%
Notional Amount	$ 55,908
Interest Rate Swap 6
Derivatives Fair Value [Line Items]
Counterparty	HSH - Star Challenger
Inception	Sep. 30, 2014
Expiry	Sep. 28, 2018
Fixed Rate	1.765%
Notional Amount	$ 6,406
Interest Rate Swap 7
Derivatives Fair Value [Line Items]
Counterparty	HSH - Star Fighter
Inception	Sep. 30, 2014
Expiry	Sep. 28, 2018
Fixed Rate	1.765%
Notional Amount	$ 6,562
Interest Rate Swap 8
Derivatives Fair Value [Line Items]
Counterparty	Credit Agricole - Star Borealis
Inception	Nov. 10, 2014
Expiry	Aug. 09, 2018
Fixed Rate	1.72%
Notional Amount	$ 21,015
Interest Rate Swap 9
Derivatives Fair Value [Line Items]
Counterparty	Credit Agricole - Star Polaris
Inception	Aug. 11, 2014
Expiry	Nov. 09, 2018
Fixed Rate	1.705%
Notional Amount	$ 22,133

X

- Definition

Identification of the name or type of counterparty to the derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column A
-Footnote 1

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Fixed interest rate related to the interest rate derivative.

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