Fair Value Measurements (Fair Value of Assets Measured on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Impaired loans:
Impaired loans	$ 18,264	$ 19,831
Other real estate owned	2,302	2,477
Total assets measured at fair value on a nonrecurring basis	20,566	22,308
Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	18,264	19,831
Other real estate owned	2,302	2,477
Total assets measured at fair value on a nonrecurring basis	20,566	22,308
Residential Portfolio Segment [Member]
Impaired loans:
Impaired loans	6,184	7,461
Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	6,184	7,461
Commercial Real Estate Portfolio Segment [Member]
Impaired loans:
Impaired loans	5,402	5,903
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	5,402	5,903
Commercial Portfolio Segment [Member]
Impaired loans:
Impaired loans	345
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	345
Consumer Portfolio Segment [Member]
Impaired loans:
Impaired loans		99
Consumer Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans		99
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]
Impaired loans:
Impaired loans	6,333	6,368
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired loans	$ 6,333	$ 6,368