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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Useful Lives of Principal Classes of Assets | The ranges of useful lives of the principal classes of assets are as follows:
|  | Bank premises |  | 15 – 39 years
|  | Leasehold improvements |  | Shorter of estimated economic lives of 15 years or term of the lease.
|  | Computer equipment |  | 3 – 5 years
|  | Furniture, fixtures and equipment |  | 5 – 7 years

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