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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary of Significant Accounting Policies |
Schedule of entities in which bank directly or indirectly owns a controlling interest |
|  |  |  |  |  |  |  | Interest Owned |
|  |  |  |  |  |  |  | Direct |  | Indirect |  | Total |
|  |  |  |  |  | Functional |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |
RUT |  | Subsidiaries |  | Country |  | Currency |  | % |  | % |  | % |  | % |  | % |  | % |
96,767,630-6 |  | Banchile Administradora General de Fondos S.A. |  | Chile |  | Ch$ |  | 99.98 |  | 99.98 |  | 0.02 |  | 0.02 |  | 100.00 |  | 100.00 |
96,543,250-7 |  | Banchile Asesoría Financiera S.A. |  | Chile |  | Ch$ |  | 99.96 |  | 99.96 |  | — |  | — |  | 99.96 |  | 99.96 |
77,191,070-K |  | Banchile Corredores de Seguros Ltda. |  | Chile |  | Ch$ |  | 99.83 |  | 99.83 |  | 0.17 |  | 0.17 |  | 100.00 |  | 100.00 |
96,571,220-8 |  | Banchile Corredores de Bolsa S.A. |  | Chile |  | Ch$ |  | 99.70 |  | 99.70 |  | 0.30 |  | 0.30 |  | 100.00 |  | 100.00 |
96,932,010-K |  | Banchile Securitizadora S.A. |  | Chile |  | Ch$ |  | 99.01 |  | 99.01 |  | 0.99 |  | 0.99 |  | 100.00 |  | 100.00 |
96,645,790-2 |  | Socofin S.A. |  | Chile |  | Ch$ |  | 99.00 |  | 99.00 |  | 1.00 |  | 1.00 |  | 100.00 |  | 100.00 |
Schedule of maximum period for write-offs of loans |
Type of Loan |  | Term
Consumer loans — secured and unsecured |  | 6 months
Other transactions — unsecured |  | 24 months
Commercial loans — secured |  | 36 months
Residential mortgage loans |  | 48 months
Consumer leases |  | 6 months
Other non-real estate lease transactions |  | 12 months
Real estate leases (commercial or residential) |  | 36 months
Schedule of estimated useful lives | Estimated useful lives for 2016 and 2017 are as follows:
Buildings |  | 50 years
Installations (in general) |  | 10 years
Equipment |  | 5 years
Office furniture |  | 5 years

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