Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of useful lives for premises and equipment

The ranges of estimated useful lives for the principal classes of assets are as follows:

Premises and Equipment	Useful Lives
Buildings and building improvements	25 years
Furniture, fixtures and equipment	3 to 7 years
Leasehold improvements	Term of lease or useful life, whichever is shorter