Fair Value Measurements, Quantitative Information (Details) - Level 3 [Member] $ in Thousands	Jun. 30, 2018 USD ($)
Commercial Real Estate [Member]
Quantitative Information [Abstract]
Impaired loans	$ 2,594
Commercial Real Estate [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Minimum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0325
Commercial Real Estate [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Maximum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0325
Commercial Real Estate [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Weighted Average [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0325
Residential 1st Mortgage [Member]
Quantitative Information [Abstract]
Impaired loans	$ 1,485
Residential 1st Mortgage [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Minimum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.01
Residential 1st Mortgage [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Maximum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.04
Residential 1st Mortgage [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Weighted Average [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.03
Home Equity Lines and Loans [Member]
Quantitative Information [Abstract]
Impaired loans	$ 72
Home Equity Lines and Loans [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Minimum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.01
Home Equity Lines and Loans [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Maximum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.02
Home Equity Lines and Loans [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Weighted Average [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.01
Commercial [Member]
Quantitative Information [Abstract]
Impaired loans	$ 1,490
Commercial [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Minimum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0295
Commercial [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Maximum [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0870
Commercial [Member] \| Income Approach [Member] \| Capitalization Rate [Member] \| Weighted Average [Member]
Quantitative Information [Abstract]
Impaired loans, measurement input	0.0340
Real Estate Construction [Member]
Quantitative Information [Abstract]
Other real estate	$ 873
Real Estate Construction [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Minimum [Member]
Quantitative Information [Abstract]
Other real estate, measurement input	0.1
Real Estate Construction [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Maximum [Member]
Quantitative Information [Abstract]
Other real estate, measurement input	0.1
Real Estate Construction [Member] \| Sales Comparison Approach [Member] \| Adjustment for Difference Between Comparable Sales [Member] \| Weighted Average [Member]
Quantitative Information [Abstract]
Other real estate, measurement input	0.1

Residential 1st Mortgage [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Minimum [Member]

Residential 1st Mortgage [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Maximum [Member]

Residential 1st Mortgage [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Weighted Average [Member]

Home Equity Lines and Loans [Member]

Home Equity Lines and Loans [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Minimum [Member]

Home Equity Lines and Loans [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Maximum [Member]

Home Equity Lines and Loans [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Weighted Average [Member]

Commercial [Member]

Commercial [Member] | Income Approach [Member] | Capitalization Rate [Member] | Minimum [Member]

Commercial [Member] | Income Approach [Member] | Capitalization Rate [Member] | Maximum [Member]

Commercial [Member] | Income Approach [Member] | Capitalization Rate [Member] | Weighted Average [Member]

Real Estate Construction [Member]

Real Estate Construction [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Minimum [Member]

Real Estate Construction [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Maximum [Member]

Real Estate Construction [Member] | Sales Comparison Approach [Member] | Adjustment for Difference Between Comparable Sales [Member] | Weighted Average [Member]