Fair Value Unobservable Inputs (Details) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands	Sep. 30, 2017 USD ($)
Impaired Loans [Member] | Fair Value, Disclosure Item Amounts [Domain]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Assets, Fair Value Disclosure	$ 2,664
Impaired Loans [Member] | Fair Value, Disclosure Item Amounts [Domain] | Appraisal, Appraisal Discount [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Unobservable Input, Weighted Average of Input Percent	16.90%
Other Real Estate Owned [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Assets, Fair Value Disclosure	$ 103
Other Real Estate Owned [Member] | Appraisal, Appraisal Discount [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Unobservable Input, Weighted Average of Input Percent	18.90%
Mortgage Servicing Rights [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Assets, Fair Value Disclosure	$ 1,703
Mortgage Servicing Rights [Member] | Discounted Cash Flow, Prepayment Speed [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Unobservable Input, Weighted Average of Input Percent	11.00%
Mortgage Servicing Rights [Member] | Discounted Cash Flow, Discount Rate [Member]
Schedule Of Fair Value Significant Unobservable Inputs Used [Line Items]
Unobservable Input, Weighted Average of Input Percent	10.00%