Marketable securities (Tables)

12 Months Ended

Dec. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Trading Securities (and Certain Trading Assets) [Table Text Block]

As of December 31, 2010, December 31, 2011 and December 31, 2012 there were no unrealized gains or losses.

(in thousands of U.S dollars)	Fair value				Value at  cost				Unrealized Gains (Losses)
	2011		2012		2011		2012		2011		2012
Credit Agricole securities		17,802		6,413		17,802		6,413		-		-
HSBC securities		3,233		-		3,233		-		-		-
Total		21,035		6,413		21,035		6,413		-		-

Available-for-sale Securities [Table Text Block]

Gross realized gains on sales of these available-for-sale securities amounted to $74,000, $41,000 and $6,000 for the years ended December 31, 2010, 2011 and 2012 respectively.

(in thousands of U.S dollars)	Proceeds from sales				Purchase of securities				Gross gains (Losses)
	2011		2012		2011		2012		2011		2012
Credit Agricole securities		5,775		15,143		8,062		3,573		10		3
HSBC securities		20,607		3,216		16,953		-		31		3
Total		26,382		18,359		25,015		3,573		41		6