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Accumulated other comprehensive income (loss) (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Accumulated other comprehensive income loss [Line Items] |  |  |  |
Net gain on sale of financial instruments at FVOCI |  | $ (696) | $ (8,078) | $ 2,114
Realized gains (losses) on financial assets measured at fair value through other comprehensive income | [1] | (2,483) | 3,551 | (8,365)
Interest expense - borrowings and deposits |  | 63,417 | 70,558 | 63,045
Realized gains (losses) on financial instruments at FVOCI [Member] |  |  |  |
Disclosure of Accumulated other comprehensive income loss [Line Items] |  |  |  |
Interest income - financial instruments at FVOCI |  | 0 | 0 | 240
Net gain on sale of financial instruments at FVOCI |  | 24 | (7,243) | 393
Derivative financial instruments and hedging |  | (108) | 6,213 | (4,786)
Realized gains (losses) on financial assets measured at fair value through other comprehensive income | [1] | (84) | (1,030) | (4,153)
Gains (losses) on derivative financial instruments [Member] |  |  |  |
Disclosure of Accumulated other comprehensive income loss [Line Items] |  |  |  |
Realized gains (losses) on financial assets measured at fair value through other comprehensive income | [1] | (2,399) | 4,581 | (4,212)
Interest income - loans at amortized cost |  | (7,611) | (4,750) | (1,822)
Interest expense - borrowings and deposits |  | (2,102) | 1,679 | 0
Net gain (loss) on foreign currency exchange |  | 7,216 | 6,060 | (2,390)
Net gain (loss) on interest rate swaps |  | 86 | 1,104 | (229)
Net gain (loss) on cross-currency interest rate swap |  | $ 12 | $ 488 | $ 84
[1] | Reclassification adjustments include amounts recognized in profit of the year that had been part of other comprehensive income (loss) in this and previous years.

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- Definition The amount of reclassification adjustments related to financial assets measured at fair value through other comprehensive income, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_92&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of reclassification adjustments related to hedges of net investments in foreign operations, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_92&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 39 -IssueDate 2017-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=39&date=2017-03-01&anchor=para_102&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 24C -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_24C_b_iv&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 24E -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_24E_a&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 9 -IssueDate 2017-01-01 -Paragraph 6.5.14 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=9&date=2017-03-01&anchor=para_6.5.14&doctype=Standard -URIDate 2017-03-09 + Details
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