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RELATED PARTY TRANSACTIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended					9 Months Ended			9 Months Ended					9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 GMC	Sep. 30, 2011 GMC	Dec. 31, 2011 GMC	Sep. 30, 2012 Constantine Georgiopoulos	Sep. 30, 2011 Constantine Georgiopoulos	Dec. 31, 2011 Constantine Georgiopoulos	Sep. 30, 2012 NSM	Sep. 30, 2011 NSM	Sep. 30, 2012 Aegean	Sep. 30, 2011 Aegean	Dec. 31, 2011 Aegean	Sep. 30, 2012 MEP	Sep. 30, 2011 MEP	Dec. 31, 2011 MEP
Related party transactions
Revenue from related party	$ 828	$ 828	$ 2,466	$ 2,457												$ 2,466	$ 2,457
Expenses incurred from transactions with related party					45	168		16	38		0	2	1,170	1,342
Amount due to the entity from a related party					21		114									3		7
Reserve kept pursuant to bankruptcy proceedings of the related party							90
Amount due to the related party								16		29			98		408
Amount invoiced for services performed and expenses paid					$ 140	$ 136										$ 2,541	$ 2,514

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