Fair Value Measurements (Fair Value of Assets Measured on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Impaired loans:
Impaired loans	$ 20,363	$ 19,831
Other real estate owned	2,354	2,477
Total assets measured at fair value on a nonrecurring basis	22,717	22,308
Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	20,363	19,831
Other real estate owned	2,354	2,477
Total assets measured at fair value on a nonrecurring basis	22,717	22,308
Residential Portfolio Segment [Member]
Impaired loans:
Impaired loans	7,692	7,461
Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	7,692	7,461
Commercial Real Estate Portfolio Segment [Member]
Impaired loans:
Impaired loans	5,372	5,903
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	5,372	5,903
Consumer Portfolio Segment [Member]
Impaired loans:
Impaired loans	99	99
Consumer Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	99	99
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]
Impaired loans:
Impaired loans	7,200	6,368
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	$ 7,200	$ 6,368