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Financial instruments (Details 15) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [1] | $ 5,419,379,000 |  | $ 5,907,494,000
Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 5,505,658,000 | [2] | 6,020,731,000
Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 4,137,949,000 | [2] | 4,253,805,000
Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 1,308,950 | [2] | 1,654,889,000
Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 0 | [2] | 58,673,000
Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 23,759,000 | [2] | 4,000,000
Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 0 | [2] | 35,000,000
Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 35,000,000 | [2] | 14,364,000
Private corporations [Member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 1,882,846,000 |  | 2,655,910,000
Private corporations [Member] | Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 1,336,032,000 |  | 1,714,936,000
Private corporations [Member] | Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 523,055,000 |  | 863,937,000
Private corporations [Member] | Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 58,673,000
Private corporations [Member] | Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 23,759,000 |  | 4,000,000
Private corporations [Member] | Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private corporations [Member] | Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 14,364,000
State-owned corporations [Member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 723,267,000 |  | 786,900,000
State-owned corporations [Member] | Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 563,877,000 |  | 646,797,000
State-owned corporations [Member] | Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 159,390,000 |  | 140,103,000
State-owned corporations [Member] | Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned corporations [Member] | Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned corporations [Member] | Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned corporations [Member] | Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private banking and financial institutions [Member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 2,083,795,000 |  | 1,738,999,000
Private banking and financial institutions [Member] | Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 1,729,592,000 |  | 1,457,984,000
Private banking and financial institutions [Member] | Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 354,203,000 |  | 281,015,000
Private banking and financial institutions [Member] | Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private banking and financial institutions [Member] | Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private banking and financial institutions [Member] | Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private banking and financial institutions [Member] | Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned banking and financial institutions [Member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 573,649,000 |  | 544,877,000
State-owned banking and financial institutions [Member] | Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 361,236,000 |  | 259,981,000
State-owned banking and financial institutions [Member] | Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 212,413,000 |  | 284,896,000
State-owned banking and financial institutions [Member] | Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned banking and financial institutions [Member] | Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned banking and financial institutions [Member] | Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
State-owned banking and financial institutions [Member] | Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables | [2] | 0 |  | 0
Private middle-market companies [Member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 242,101,000 | [2] | 294,045,000
Private middle-market companies [Member] | Rating 1-4 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 147,212,000 | [2] | 174,107,000
Private middle-market companies [Member] | Rating 5-6 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 59,889,000 | [2] | 84,938,000
Private middle-market companies [Member] | Rating 7 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 0 | [2] | 0
Private middle-market companies [Member] | Rating 8 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 0 | [2] | 0
Private middle-market companies [Member] | Rating 9 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | 0 | [2] | 35,000,000
Private middle-market companies [Member] | Rating 10 [member] | Gross carrying amount [member] |  |  |  |
Disclosure of financial instruments [Line Items] |  |  |  |
Loans and receivables |  | $ 35,000,000 | [2] | $ 0
[1] | The carrying value of loans at amortized cost is net of the allowance for expected credit losses of $81.3 million and unearned interest and deferred fees of $5.0 million for December 31, 2017; allowance for expected credit losses of $106.0 million and unearned interest and deferred fees of $7.2 million for December 31, 2016.
[2] | Current ratings as of December 31, 2017 and 2016, respectively.

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- Definition The amount of non-derivative financial assets with fixed or determinable payments that are not quoted in an active market, other than: (a) those that the entity intends to sell immediately or in the near term, which shall be classified as held for trading, and those that the entity, upon initial recognition, designates as at fair value through profit or loss; (b) those that the entity, upon initial recognition, designates as available for sale; or (c) those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, which shall be classified as available for sale. An interest acquired in a pool of assets that are not loans or receivables (for example, an interest in a mutual fund or a similar fund) is not a loan or receivable. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_c&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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