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Accumulated other comprehensive income (loss) (Tables) | 12 Months Ended
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Dec. 31, 2012
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | As of December 31, 2012, 2011 and 2010 the breakdown of accumulated other comprehensive income (loss) related to investment securities available-for-sale and derivative financial instruments, and foreign currency translation is as follows:
(In thousands of US$) |  | Securities available- for-sale |  |  | Derivative financial instruments |  |  | Foreign currency translation adjustment, net of hedges |  |  | Total |
Balance as of January 1, 2010 |  |  | (3,244 | ) |  |  | (2,916 | ) |  |  | - |  |  |  | (6,160 | )
Net unrealized gains arising from the year |  |  | 2,325 |  |  |  | 1,391 |  |  |  | - |  |  |  | 3,716 |
Reclassification adjustment for gains included in net income (1) |  |  | (2,825 | ) |  |  | (1,172 | ) |  |  | - |  |  |  | (3,997 | )
Balance as of December 31, 2010 |  |  | (3,744 | ) |  |  | (2,697 | ) |  |  | - |  |  |  | (6,441 | )
Net unrealized gains arising from the year |  |  | 4,095 |  |  |  | 1,097 |  |  |  | - |  |  |  | 5,192 |
Reclassification adjustment for (gains) losses included in net income (1) |  |  | (2,079 | ) |  |  | 960 |  |  |  | - |  |  |  | (1,119 | )
Foreign currency translation adjustment, net |  |  | - |  |  |  | - |  |  |  | (744 | ) |  |  | (744 | )
Balance as of December 31, 2011 |  |  | (1,728 | ) |  |  | (640 | ) |  |  | (744 | ) |  |  | (3,112 | )
Net unrealized gains arising from the year |  |  | 8,436 |  |  |  | 5,699 |  |  |  | - |  |  |  | 14,135 |
Reclassification adjustment for gains included in net income (1) |  |  | (5,775 | ) |  |  | (5,427 | ) |  |  | - |  |  |  | (11,202 | )
Foreign currency translation adjustment, net |  |  | - |  |  |  | - |  |  |  | (551 | ) |  |  | (551 | )
Balance as of December 31, 2012 |  |  | 933 |  |  |  | (368 | ) |  |  | (1,295 | ) |  |  | (730 | )
(1) Reclassification adjustments include amounts recognized in net income during the current year that had been part of other comprehensive income (loss) in this and previous years.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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