Investment Securities - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	$ 124,200	$ 23,792
Less than 12 Months, Unrealized Losses	942	123
12 Months or More, Fair Value	46,523	102,601
12 Months or More, Unrealized Losses	902	1,883
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	10,139	8,152
Less than 12 Months, Unrealized Losses	44	540
12 Months or More, Fair Value	4,190	4,200
12 Months or More, Unrealized Losses	165	155
U.S. Treasury notes [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	18,682	9,141
Less than 12 Months, Unrealized Losses	123	7
12 Months or More, Fair Value	4,857	8,774
12 Months or More, Unrealized Losses	50	129
U.S. Agency notes [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	58,259	0
Less than 12 Months, Unrealized Losses	327	0
12 Months or More, Fair Value	27,163	65,971
12 Months or More, Unrealized Losses	447	1,212
U.S. Agency mortgage-backed securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	7,165	3,795
Less than 12 Months, Unrealized Losses	131	2
12 Months or More, Fair Value	5,070	11,456
12 Months or More, Unrealized Losses	149	217
Non-taxable Municipal securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	29,020	7,211
Less than 12 Months, Unrealized Losses	268	58
12 Months or More, Fair Value	8,174	11,419
12 Months or More, Unrealized Losses	215	246
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	9,742	8,152
Less than 12 Months, Unrealized Losses	41	540
12 Months or More, Fair Value	4,190	4,200
12 Months or More, Unrealized Losses	165	155
Taxable Municipal securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	9,547	3,117
Less than 12 Months, Unrealized Losses	46	15
12 Months or More, Fair Value	877	3,668
12 Months or More, Unrealized Losses	23	60
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	397	0
Less than 12 Months, Unrealized Losses	3	0
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Mutual funds [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	1,226	281
Less than 12 Months, Unrealized Losses	20	12
12 Months or More, Fair Value	261	1,190
12 Months or More, Unrealized Losses	8	10
Trust preferred securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	49	50
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Equity securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	252	197
Less than 12 Months, Unrealized Losses	27	29
12 Months or More, Fair Value	121	123
12 Months or More, Unrealized Losses	$ 10	$ 9