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Derivative Instruments and Accounting Hedges - Bank's Portfolio of Derivative Instruments (Details) $ in Thousands, $ in Millions | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CLP ($) | Dec. 31, 2016 CLP ($)
--- | --- | --- | ---
Financial instrument disclosures |  |  |
Fair value assets | $ 2,027,755 | $ 1,247,941 | $ 939,649
Fair value liabilities | $ 2,263,450 | 1,392,995 | 966,509
Derivatives |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 96,663,326 | 67,171,055
Fair value assets - trading |  | 1,220,092 | 875,949
Fair value liabilities - trading |  | 1,306,777 | 910,494
Notional amount |  | 97,904,771 | 68,507,858
Fair value assets |  | 1,247,941 | 939,649
Fair value liabilities |  | 1,392,995 | 966,509
Currency forward |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 29,451,333 | 22,834,923
Fair value assets - trading |  | 506,614 | 163,716
Fair value liabilities - trading |  | 574,931 | 136,101
Interest rate forward |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 14,000 |
Fair value liabilities - trading |  | 206 |
Interest rate swap |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 55,617,104 | 34,896,973
Fair value assets - trading |  | 243,931 | 253,307
Fair value liabilities - trading |  | 236,954 | 246,415
Cross currency swap |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 11,281,240 | 9,142,390
Fair value assets - trading |  | 466,192 | 455,784
Fair value liabilities - trading |  | 490,811 | 525,160
Call Options |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 153,776 | 174,060
Fair value assets - trading |  | 514 | 1,558
Fair value liabilities - trading |  | 472 | 1,960
Put Options |  |  |
Financial instrument disclosures |  |  |
Notional amount - trading |  | 145,873 | 122,709
Fair value assets - trading |  | 2,841 | 1,584
Fair value liabilities - trading |  | 3,403 | 858
Fair value hedge (Swaps) | Derivatives |  |  |
Financial instrument disclosures |  |  |
Notional amount - hedging |  | 92,884 | 138,802
Fair value assets - hedging |  | 277 | 218
Fair value liabilities - hedging |  | 5,330 | 10,293
Fair value hedge (Swaps) | Interest rate swap |  |  |
Financial instrument disclosures |  |  |
Notional amount - hedging |  | 78,970 | 122,081
Fair value assets - hedging |  | 277 | 218
Fair value liabilities - hedging |  | 1,678 | 5,989
Notional amount |  | 78,970 | 122,081
Fair value hedge (Swaps) | Cross currency swap |  |  |
Financial instrument disclosures |  |  |
Notional amount - hedging |  | 13,914 | 16,721
Fair value liabilities - hedging |  | 3,652 | 4,304
Notional amount |  | 13,914 | 16,721
Cash flow hedge (Swaps) | Derivatives |  |  |
Financial instrument disclosures |  |  |
Notional amount - hedging |  | 1,148,561 | 1,198,001
Fair value assets - hedging |  | 27,572 | 63,482
Fair value liabilities - hedging |  | 80,888 | 45,722
Cash flow hedge (Swaps) | Swaps |  |  |
Financial instrument disclosures |  |  |
Notional amount - hedging |  | 1,148,561 | 1,198,001
Fair value assets - hedging |  | 27,572 | 63,482
Fair value liabilities - hedging |  | $ 80,888 | $ 45,722

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