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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

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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Schedule Of Useful Life Of Property Plant And Equipment [Table Text Block]

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