Investment Securities, Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-Sale, Amortized Cost
Due within one year	$ 27,119
Due from one to five years	120,742
Due from five to ten years	135,686
Due after ten years	4,330
Available-for-sale, amortized cost	287,877
Available-for-sale, amortized cost	340,828	$ 377,267
Available-for-Sale, Fair Value
Due within one year	27,161
Due from one to five years	122,761
Due from five to ten years	138,587
Due after ten years	4,311
Available-for-sale, fair value	292,820
Available-for-sale, at fair value	346,391	377,978
Held-to-Maturity, Amortized Cost
Due within one year	3,640
Due from one to five years	4,154
Due from five to ten years	11,073
Due after ten years	23,170
Amortized Cost	42,037	22,633
Held-to-Maturity, Fair Value
Due within one year	3,643
Due from one to five years	4,159
Due from five to ten years	11,297
Due after ten years	23,780
Held-to-maturity, fair value	42,879	22,630
Available-for-sale securities pledged as collateral	195,448	215,952
U.S. Agency mortgage-backed securities [Member]
Available-for-Sale, Amortized Cost
Available-for-sale, amortized cost	49,753	29,608
Available-for-Sale, Fair Value
Available-for-sale, at fair value	50,322	29,378
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	0
Mutual funds [Member]
Available-for-Sale, Amortized Cost
Available-for-sale, amortized cost	2,517	2,517
Available-for-Sale, Fair Value
Available-for-sale, at fair value	2,508	2,466
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	0
Trust preferred securities [Member]
Available-for-Sale, Amortized Cost
Available-for-sale, amortized cost	49	49
Available-for-Sale, Fair Value
Available-for-sale, at fair value	49	50
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	0
Equity securities [Member]
Available-for-Sale, Amortized Cost
Available-for-sale, amortized cost	632	659
Available-for-Sale, Fair Value
Available-for-sale, at fair value	692	$ 680
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	$ 0