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Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income - Securities classified as available-for-sale (Details) $ in Thousands, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 CLP ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CLP ($) | Dec. 31, 2017 CLP ($)
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | $ 1,526,315
Financial assets at fair value through other comprehensive income |  | $ 1,518,441 | $ 1,053,191 |
Assets instruments Available-for Sale |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 1,526,315
Net unrealized gain recorded in other comprehensive income for available for sale securities | $ 9,521 |  |  |
Assets instruments Available-for Sale | Instruments issued by the Chilean Governments and Central Bank of Chile | Comder Contraparte Central S.A |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Amount of other financial instruments considered as collateral guarantee by executing derivative contracts | $ 31,415 |  |  |
Assets instruments Available-for Sale | Bonds issued by the Chilean Government and Central Bank | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 204,128
Assets instruments Available-for Sale | Promissory notes issued by the Chilean Government and Central Bank | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 3,346
Assets instruments Available-for Sale | Other instruments | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 148,894
Assets instruments Available-for Sale | Other instruments | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 83,006
Assets instruments Available-for Sale | Other instruments with repurchase agreements | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  | 5,177 |
Repurchase agreement expiration period | 3 days |  |  |
Assets instruments Available-for Sale | Equity instruments valued at cost | Instruments issued by foreign institutions |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 50
Assets instruments Available-for Sale | Equity instruments valued at fair value | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 9,218
Assets instruments Available-for Sale | Equity instruments valued at fair value | Instruments issued by foreign institutions |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 984
Assets instruments Available-for Sale | Mortgage bonds from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 99,572
Assets instruments Available-for Sale | Bonds from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 5,415
Assets instruments Available-for Sale | Deposits from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 956,733
Assets instruments Available-for Sale | Bonds from other Chilean companies | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  |  | 14,969
Debt instruments valued at fair value |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Net unrealized gain recorded in other comprehensive income for available for sale securities | $ 3,649 |  |  |
Impairment of financial assets | $ 4,268 |  |  |
Financial assets at fair value through other comprehensive income |  |  | 1,043,440 | $ 1,516,063
Debt instruments valued at fair value | Other instruments | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Assets |  |  | 6,965 |
Repurchase agreement expiration period | 3 days |  |  |
Debt instruments valued at fair value | Fair value |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 1,043,440 |
Debt instruments valued at fair value | Fair value | Bonds issued by the Chilean Government and Central Bank | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 135,145 |
Debt instruments valued at fair value | Fair value | Other instruments | Instruments issued by the Chilean Governments and Central Bank of Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 29,077 |
Debt instruments valued at fair value | Fair value | Other instruments | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 107,125 |
Debt instruments valued at fair value | Fair value | Other instruments | Instruments issued by foreign institutions |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 108,544 |
Debt instruments valued at fair value | Fair value | Mortgage bonds from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 92,491 |
Debt instruments valued at fair value | Fair value | Bonds from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 5,351 |
Debt instruments valued at fair value | Fair value | Deposits from domestic banks | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | 559,108 |
Debt instruments valued at fair value | Fair value | Bonds from other Chilean companies | Other instruments issued in Chile |  |  |  |
Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income |  |  |  |
Financial assets at fair value through other comprehensive income |  |  | $ 6,599 |

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