Investment Securities - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	$ 27,477	$ 186,285
Less than 12 Months, Unrealized Losses	71	1,548
12 Months or More, Fair Value	9,027	27,041
12 Months or More, Unrealized Losses	121	480
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	4,159	1,231
Less than 12 Months, Unrealized Losses	16	4
12 Months or More, Fair Value	3,444	3,426
12 Months or More, Unrealized Losses	76	94
U.S. Treasury notes [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	0	32,854
Less than 12 Months, Unrealized Losses	0	75
12 Months or More, Fair Value	0	4,846
12 Months or More, Unrealized Losses	0	60
U.S. Agency notes [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	9,989	104,053
Less than 12 Months, Unrealized Losses	6	1,000
12 Months or More, Fair Value	0	9,869
12 Months or More, Unrealized Losses	0	151
U.S. Agency mortgage-backed securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	5,281	19,190
Less than 12 Months, Unrealized Losses	17	256
12 Months or More, Fair Value	4,013	4,068
12 Months or More, Unrealized Losses	57	148
Non-taxable Municipal securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	9,202	13,124
Less than 12 Months, Unrealized Losses	32	74
12 Months or More, Fair Value	4,220	7,037
12 Months or More, Unrealized Losses	24	60
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	873	832
Less than 12 Months, Unrealized Losses	2	3
12 Months or More, Fair Value	3,444	3,426
12 Months or More, Unrealized Losses	76	94
Taxable Municipal securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	1,660	15,601
Less than 12 Months, Unrealized Losses	4	114
12 Months or More, Fair Value	449	880
12 Months or More, Unrealized Losses	1	20
Investment Securities Held-to-Maturity:
Less than 12 Months, Fair Value	3,286	399
Less than 12 Months, Unrealized Losses	14	1
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	1,221	1,215
Less than 12 Months, Unrealized Losses	1	17
12 Months or More, Fair Value	272	268
12 Months or More, Unrealized Losses	34	34
Trust preferred securities [Member]
Investment Securities Available-for-Sale:
Less than 12 Months, Fair Value	0	0
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	124	248
Less than 12 Months, Unrealized Losses	11	12
12 Months or More, Fair Value	73	73
12 Months or More, Unrealized Losses	$ 5	$ 7