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RELATED PARTY TRANSACTIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended			6 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 GMC	Jun. 30, 2012 GMC	Dec. 31, 2012 GMC	Jun. 30, 2013 Constantine Georgiopoulos	Jun. 30, 2012 Constantine Georgiopoulos	Dec. 31, 2012 Constantine Georgiopoulos	Jun. 30, 2013 MEP	Jun. 30, 2012 MEP	Dec. 31, 2012 MEP	Jun. 30, 2013 Aegean	Jun. 30, 2012 Aegean	Dec. 31, 2012 Aegean
Related party transactions
Revenue from related party	$ 819	$ 819	$ 1,629	$ 1,638							$ 1,629	$ 1,638
Expenses incurred from transactions with related party					54	17		7	3					746	761
Amount due to the entity from a related party					5						4		5
Amount due to the related party							12	7		0				245		278
Amount invoiced for services performed and expenses paid					$ 75	$ 98					$ 1,708	$ 1,682

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