Investment Securities Investment Securities - Maturities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Amortized Cost
Due within one year	$ 13,154
Due from one to five years	146,077
Due from five to ten years	111,848
Due after ten years	9,336
Available-for-sale, amortized cost	280,415
Amortized Cost	326,354	260,728
Available-for-sale, Fair Value
Due within one year	13,238
Due from one to five years	147,276
Due from five to ten years	111,583
Due after ten years	9,233
Available-for-sale, fair value	281,330
Available-for-sale, at fair value	327,740	258,241
Held-to-maturity, amortized cost
Due within one year	2,086
Due from one to five years	4,130
Due from five to ten years	5,117
Due after ten years	12,510
Amortized Cost	23,843	16,323
Held-to-Maturity, Amortized Cost	23,843
Held-to-Maturity, Fair Value
Due within one year	2,097
Due from one to five years	4,131
Due from five to ten years	4,939
Due after ten years	12,581
Fair Value	23,748	16,196
Available-for-sale Securities Pledged as Collateral	202,316	157,956
US Agency Mortgage-Backed Securities [Member]
Available-for-sale Securities, Amortized Cost
Amortized Cost	41,979	40,602
Available-for-sale, Fair Value
Available-for-sale, at fair value	42,150	40,309
Held-to-maturity, amortized cost
Held-to-Maturity, Amortized Cost	0
Held-to-Maturity, Fair Value
Fair Value	0
Mutual Funds [Member]
Available-for-sale Securities, Amortized Cost
Amortized Cost	2,436	2,419
Available-for-sale, Fair Value
Available-for-sale, at fair value	2,419	2,380
Held-to-maturity, amortized cost
Held-to-Maturity, Amortized Cost	0
Held-to-Maturity, Fair Value
Fair Value	0
Trust Preferred Securities [Member]
Available-for-sale Securities, Amortized Cost
Amortized Cost	50	149
Available-for-sale, Fair Value
Available-for-sale, at fair value	49	147
Held-to-maturity, amortized cost
Held-to-Maturity, Amortized Cost	0
Held-to-Maturity, Fair Value
Fair Value	0
Equity Securities [Member]
Available-for-sale Securities, Amortized Cost
Amortized Cost	1,474	1,429
Available-for-sale, Fair Value
Available-for-sale, at fair value	1,792	1,693
Held-to-maturity, amortized cost
Held-to-Maturity, Amortized Cost	0
Held-to-Maturity, Fair Value
Fair Value	$ 0