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Investment securities (Tables) | 12 Months Ended
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Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract] |
Available-for-sale Securities [Table Text Block] | The amortized cost, related unrealized gross gain (loss) and fair value of securities available-for-sale by country risk and type of debt, are as follows:
|  | December 31, 2013 |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
(In thousands of US$) |  | Cost |  | Gross Gain |  | Gross Loss |  | Value |
Corporate debt: |  |  |  |  |  |  |  |  |
Brazil |  | 41,439 |  | 11 |  | 778 |  | 40,672 |
Colombia |  | 44,536 |  | 65 |  | 1,351 |  | 43,250 |
Chile |  | 21,807 |  | 15 |  | 751 |  | 21,071 |
Honduras |  | 9,400 |  | - |  | 136 |  | 9,264 |
Panama |  | 7,159 |  | - |  | 78 |  | 7,081 |
Peru |  | 29,439 |  | 42 |  | 674 |  | 28,807 |
Venezuela |  | 29,871 |  | - |  | 1,848 |  | 28,023 |
|  | 183,651 |  | 133 |  | 5,616 |  | 178,168 |
Sovereign debt: |  |  |  |  |  |  |  |  |
Brazil |  | 32,751 |  | 936 |  | 645 |  | 33,042 |
Colombia |  | 42,776 |  | - |  | 1,125 |  | 41,651 |
Chile |  | 20,772 |  | 12 |  | 610 |  | 20,174 |
Mexico |  | 35,730 |  | - |  | 2,445 |  | 33,285 |
Panama |  | 12,485 |  | 71 |  | 553 |  | 12,003 |
Peru |  | 11,589 |  | - |  | 65 |  | 11,524 |
Trinidad and Tobago |  | 4,665 |  | - |  | 144 |  | 4,521 |
|  | 160,768 |  | 1,019 |  | 5,587 |  | 156,200 |
Total |  | 344,419 |  | 1,152 |  | 11,203 |  | 334,368 |
|  | December 31, 2012 |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
(In thousands of US$) |  | Cost |  | Gross Gain |  | Gross Loss |  | Value |
Corporate debt: |  |  |  |  |  |  |  |  |
Brazil |  | 13,581 |  | 158 |  | - |  | 13,739 |
Colombia |  | 986 |  | 60 |  | - |  | 1,046 |
Chile |  | 1,967 |  | 87 |  | - |  | 2,054 |
Peru |  | 530 |  | 17 |  | - |  | 547 |
|  | 17,064 |  | 322 |  | - |  | 17,386 |
Sovereign debt: |  |  |  |  |  |  |  |  |
Brazil |  | 28,783 |  | 1,965 |  | - |  | 30,748 |
Colombia |  | 15,489 |  | - |  | 199 |  | 15,290 |
Chile |  | 1,061 |  | 1 |  | - |  | 1,062 |
Honduras |  | 15,986 |  | 224 |  | - |  | 16,210 |
Mexico |  | 20,553 |  | 1,779 |  | - |  | 22,332 |
Panama |  | 37,845 |  | 1,828 |  | - |  | 39,673 |
Venezuela |  | 39,548 |  | 801 |  | 33 |  | 40,316 |
|  | 159,265 |  | 6,598 |  | 232 |  | 165,631 |
Total |  | 176,329 |  | 6,920 |  | 232 |  | 183,017 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] | The following table discloses those securities that have had unrealized losses for less than 12 months and for 12 months or longer:
|  | December 31, 2013 |
(In thousands of US$) |  | Less than 12 months |  | 12 months or longer |  | Total |
|  |  |  | Unrealized |  |  |  | Unrealized |  |  |  | Unrealized |
|  | Fair |  | Gross |  | Fair |  | Gross |  | Fair |  | Gross |
|  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses |
Corporate debt |  | 136,895 |  | 5,113 |  | 6,866 |  | 503 |  | 143,761 |  | 5,616 |
Sovereign debt |  | 107,239 |  | 5,210 |  | 18,557 |  | 377 |  | 125,796 |  | 5,587 |
|  | 244,134 |  | 10,323 |  | 25,423 |  | 880 |  | 269,557 |  | 11,203 |
|  | December 31, 2012 |
(In thousands of US$) |  | Less than 12 months |  | 12 months or longer |  | Total |
|  |  |  | Unrealized |  |  |  | Unrealized |  |  |  | Unrealized |
|  | Fair |  | Gross |  | Fair |  | Gross |  | Fair |  | Gross |
|  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses |
Sovereign debt |  | 10,188 |  | 79 |  | 10,009 |  | 153 |  | 20,197 |  | 232 |
|  | 10,188 |  | 79 |  | 10,009 |  | 153 |  | 20,197 |  | 232 |
Schedule of Realized Gain (Loss) [Table Text Block] | The following table presents the realized gains and losses on sale of securities available-for-sale:
|  | Year ended December 31 |
(In thousands of US$) |  | 2013 |  | 2012 |  | 2011 |
Gains |  | 1,523 |  | 6,141 |  | 3,825 |
Losses |  | (1) |  | (111) |  | (412) |
Net |  | 1,522 |  | 6,030 |  | 3,413 |
Held-to-maturity Securities [Table Text Block] | The amortized cost and fair value of securities available-for-sale by contractual maturity as of December 31, 2013, are shown in the following table:
|  | Amortized |  | Fair |
(In thousands of US$) |  | Cost |  | Value |
Due within 1 year |  | 25,970 |  | 26,257 |
After 1 year but within 5 years |  | 177,810 |  | 176,622 |
After 5 years but within 10 years |  | 140,639 |  | 131,489 |
|  | 344,419 |  | 334,368 |
Schedule Of Amortized cost And Fair value And Unrealized Gross Gain Of Held To Maturity Securities [Table Text Block] | The amortized cost, related unrealized gross gain (loss) and fair value of securities held-to-maturity by country risk and type of debt are as follows:
|  | December 31, 2013 |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
(In thousands of US$) |  | Cost |  | Gross Gain |  | Gross Loss |  | Value |
Corporate debt: |  |  |  |  |  |  |  |  |
Costa Rica |  | 2,000 |  | - |  | - |  | 2,000 |
Honduras |  | 4,118 |  | - |  | - |  | 4,118 |
Panama |  | 14,634 |  | 8 |  | 18 |  | 14,624 |
|  | 20,752 |  | 8 |  | 18 |  | 20,742 |
Sovereign debt: |  |  |  |  |  |  |  |  |
Colombia |  | 13,007 |  | - |  | 115 |  | 12,892 |
Total |  | 33,759 |  | 8 |  | 133 |  | 33,634 |
|  | December 31, 2012 |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair |
(In thousands of US$) |  | Cost |  | Gross Gain |  | Gross Loss |  | Value |
Corporate debt: |  |  |  |  |  |  |  |  |
Panama |  | 12,660 |  | - |  | - |  | 12,660 |
Sovereign debt: |  |  |  |  |  |  |  |  |
Colombia |  | 13,011 |  | 4 |  | 3 |  | 13,012 |
Honduras |  | 6,442 |  | 9 |  | 19 |  | 6,432 |
Panama |  | 2,000 |  | 45 |  | - |  | 2,045 |
|  | 21,453 |  | 58 |  | 22 |  | 21,489 |
Total |  | 34,113 |  | 58 |  | 22 |  | 34,149 |
Schedule Of Amortized Cost Of Securities Held To Maturity [Table Text Block] | The amortized cost and fair value of securities held-to-maturity by contractual maturity as of December 31, 2013, are shown in the following table:
|  | Amortized |  | Fair |
(In thousands of US$) |  | Cost |  | Value |
Due within 1 year |  | 18,701 |  | 18,709 |
After 1 year but within 5 years |  | 15,058 |  | 14,925 |
|  | 33,759 |  | 33,634 |

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