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Current Taxes and Deferred Taxes - Reconciliation of effective tax rate (Details) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CLP ($) | Dec. 31, 2016 CLP ($) | Dec. 31, 2015 CLP ($) | Dec. 31, 2014
Tax rate % |  |  |  |  |  |
Income tax calculated on net income before tax (as a percent) | 27.00% | 25.50% | 25.50% | 24.00% | 22.50% | 21.00%
Subordinated Debt Payment (as a percent) |  | (5.67%) | (5.67%) | (5.05%) | (4.57%) |
Additions or deductions (as a percent) |  | (2.88%) | (2.88%) | (3.90%) | (3.91%) |
Tax from previous years (as a percent) |  | (0.20%) | (0.20%) | 0.15% | (0.27%) |
Effect of changes in tax rate (as a percent) |  | (0.83%) | (0.83%) | (1.36%) | (2.63%) |
Other (as a percent) |  | 0.87% | 0.87% | 1.00% | 0.77% |
Effective rate and income tax expense (as a percent) |  | 16.79% | 16.79% | 14.84% | 11.89% |
Credit to Income for tax rate change |  |  |  |  |  |
Income tax calculated on net income before tax |  |  | $ 175,298 | $ 162,063 | $ 155,751 |
Subordinated Debt Payment |  |  | (38,997) | (34,092) | (31,638) |
Additions or deductions |  |  | (19,794) | (26,332) | (27,032) |
Tax from previous years |  |  | (1,401) | 1,030 | (1,851) |
Effect of changes in tax rate |  |  | (5,729) | (9,158) | (18,234) |
Other |  |  | 5,984 | 6,701 | 5,325 |
Total tax expense (income) |  | $ 187,448 | $ 115,361 | $ 100,212 | $ 82,321 |
First category tax percentage |  | 65 | 65 |  |  |
Non-deductible expenses tax rate |  | 40.00% | 40.00% | 35.00% |  |

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- Definition Represents the percentage of first category tax paid by the company that shareholders are entitled to allocate against personal taxes, as established by Article 8 of Law 20,899. + References No definition available. + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the that relates to subordinated debt payment. + References No definition available. + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Tax rate effects, in aggregate, on the reconciliation between the average effective tax rate and the applicable tax rate that the entity does not separately disclose in the reconciliation. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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