Investment Securities, Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Available-for-Sale, Amortized Cost
Due within one year	$ 23,089
Due from one to five years	150,743
Due from five to ten years	121,380
Due after ten years	506
Available-for-sale, amortized cost	295,718
Available-for-sale, amortized cost	346,609	$ 377,267
Available-for-Sale, Fair Value
Due within one year	23,181
Due from one to five years	153,748
Due from five to ten years	124,583
Due after ten years	514
Available-for-sale, fair value	302,026
Available-for-sale, at fair value	353,528	377,978
Held-to-Maturity, Amortized Cost
Due within one year	3,620
Due from one to five years	4,211
Due from five to ten years	11,073
Due after ten years	20,543
Amortized Cost	39,447	22,633
Held-to-maturity, amortized cost	39,447
Held-to-Maturity, Fair Value
Due within one year	3,626
Due from one to five years	4,222
Due from five to ten years	11,239
Due after ten years	21,195
Held-to-maturity, fair value	40,282	22,630
Available-for-sale securities pledged as collateral	228,901	215,952
U.S. Agency mortgage-backed securities [Member]
Available-for-Sale, Amortized Cost
Available-for-sale, amortized cost	47,701	29,608
Available-for-Sale, Fair Value
Available-for-sale, at fair value	48,276	29,378
Held-to-Maturity, Amortized Cost
Held-to-maturity, 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	2,508	2,517
Available-for-Sale, Fair Value
Available-for-sale, at fair value	2,499	2,466
Held-to-Maturity, Amortized Cost
Held-to-maturity, 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
Held-to-maturity, 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	633	659
Available-for-Sale, Fair Value
Available-for-sale, at fair value	678	$ 680
Held-to-Maturity, Amortized Cost
Held-to-maturity, amortized cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	$ 0