Investment Securities (Maturity Schedule) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Available-for-Sale, Amortized Cost
Total	$ 398,815
Available-for-Sale, Estimated Fair Value
Total	390,434	$ 350,040
Held-to-Maturity, Amortized Cost
Total	147,967	142,461
Held-to-Maturity, Estimated Fair Value
Total	145,185	140,875
U.S. government sponsored agencies debt securities [Member]
Available-for-Sale, Amortized Cost
Due in one year or less	2,005
Available-for-Sale, Estimated Fair Value
Due in one year or less	2,008
Total	2,008	2,044
Held-to-Maturity, Amortized Cost
Due in one year or less	0
Held-to-Maturity, Estimated Fair Value
Due in one year or less	0
Residential mortgage-backed securities - GSE [Member]
Available-for-Sale, Amortized Cost
Due after five years through 10 years	1,789
Due after ten years	284,268
Available-for-Sale, Estimated Fair Value
Due after five years through 10 years	1,821
Due after ten years	276,286
Total	278,107	290,145
Held-to-Maturity, Amortized Cost
Due after five years through 10 years	0
Due after ten years	120,197
Held-to-Maturity, Estimated Fair Value
Due after five years through 10 years	0
Due after ten years	117,887
Total	117,887	130,877
Residential mortgage-backed securities - Private [Member]
Available-for-Sale, Amortized Cost
Due after ten years	33,235
Available-for-Sale, Estimated Fair Value
Due after ten years	33,577
Total	33,577	17,271
Held-to-Maturity, Amortized Cost
Due after ten years	17,712
Held-to-Maturity, Estimated Fair Value
Due after ten years	17,414
Total	17,414
Commercial mortgage-backed securities - GSE [Member]
Available-for-Sale, Amortized Cost
Due after five years through 10 years	21,980
Available-for-Sale, Estimated Fair Value
Due after five years through 10 years	21,612
Total	21,612	21,958
Held-to-Maturity, Amortized Cost
Due after five years through 10 years	0
Held-to-Maturity, Estimated Fair Value
Due after five years through 10 years	0
Commercial mortgage-backed securities - Private [Member]
Available-for-Sale, Amortized Cost
Due after ten years	17,869
Available-for-Sale, Estimated Fair Value
Due after ten years	17,575
Total	17,575	10,215
Held-to-Maturity, Amortized Cost
Due after ten years	10,058
Held-to-Maturity, Estimated Fair Value
Due after ten years	9,884
Total	9,884	9,998
Corporate notes [Member]
Available-for-Sale, Amortized Cost
Due after five years through 10 years	37,669
Available-for-Sale, Estimated Fair Value
Due after five years through 10 years	37,555
Total	37,555	$ 8,407
Held-to-Maturity, Amortized Cost
Due after five years through 10 years	0
Held-to-Maturity, Estimated Fair Value
Due after five years through 10 years	$ 0