Investment Securities Investment Securities - Maturities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Available-for-sale Securities, Amortized Cost
Due within one year	$ 16,162
Due from one to five years	119,445
Due from five to ten years	117,716
Due after ten years	9,781
Available-for-sale, amortized cost	263,104
Amortized Cost	311,096	260,728
Available-for-sale, Fair Value
Due within one year	16,294
Due from one to five years	120,461
Due from five to ten years	115,829
Due after ten years	9,461
Available-for-sale, fair value	262,045
Available-for-sale, at fair value	310,063	258,241
Held-to-maturity, amortized cost
Due within one year	2,145
Due from one to five years	4,229
Due from five to ten years	6,383
Due after ten years	3,710
Amortized Cost	16,467	16,323
Held-to-Maturity, Amortized Cost	16,467
Held-to-Maturity, Fair Value
Due within one year	2,151
Due from one to five years	4,228
Due from five to ten years	6,169
Due after ten years	3,778
Fair Value	16,326	16,196
US Agency Mortgage-Backed Securities [Member]
Available-for-sale Securities, Amortized Cost
Amortized Cost	44,041	40,602
Available-for-sale, Fair Value
Available-for-sale, at fair value	43,829	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	2,427	2,419
Available-for-sale, Fair Value
Available-for-sale, at fair value	2,395	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	50	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	1,744	1,693
Held-to-maturity, amortized cost
Held-to-Maturity, Amortized Cost	0
Held-to-Maturity, Fair Value
Fair Value	$ 0