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SHARE-BASED COMPENSATION PLANS (Details Textual) S/ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 PEN (S/) | Dec. 31, 2016 PEN (S/) | Dec. 31, 2015 PEN (S/)
Share based compensation plans [Line Items] |  |  |
Applicable tax rate | 29.50% | 28.00% | 28.00%
Equity-settled transaction [Member] |  |  |
Share based compensation plans [Line Items] |  |  |
Description of vesting requirements for share-based payment arrangement | awarded shares are liberated in the three following years for up to 33.3 percent of the shares granted in each of the three previous years |  |
Applicable tax rate | 30.00% |  |
Number of share options granted in share-based payment arrangement | 140,812 | 140,498 | 124,601
Number of share options outstanding in share-based payment arrangement | 276,011 | 277,436 | 269,832
Expense from share-based payment transactions with employees | S/ 62.0 | S/ 73.9 | S/ 65.5

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