Investment Securities, Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Available-for-Sale:
Less than 12 Months, Fair Value	$ 1,122	$ 186,285
Less than 12 Months, Unrealized Losses	3	1,548
12 Months or More, Fair Value	7,393	27,041
12 Months or More, Unrealized Losses	42	480
Held-to-Maturity:
Less than 12 Months, Fair Value	0	1,231
Less than 12 Months, Unrealized Losses	0	4
12 Months or More, Fair Value	2,636	3,426
12 Months or More, Unrealized Losses	29	94
U.S. Treasury notes [Member]
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]
Available-for-Sale:
Less than 12 Months, Fair Value	0	104,053
Less than 12 Months, Unrealized Losses	0	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]
Available-for-Sale:
Less than 12 Months, Fair Value	0	19,190
Less than 12 Months, Unrealized Losses	0	256
12 Months or More, Fair Value	3,909	4,068
12 Months or More, Unrealized Losses	17	148
Non-taxable Municipal securities [Member]
Available-for-Sale:
Less than 12 Months, Fair Value	0	13,124
Less than 12 Months, Unrealized Losses	0	74
12 Months or More, Fair Value	2,770	7,037
12 Months or More, Unrealized Losses	6	60
Held-to-Maturity:
Less than 12 Months, Fair Value	0	832
Less than 12 Months, Unrealized Losses	0	3
12 Months or More, Fair Value	2,636	3,426
12 Months or More, Unrealized Losses	29	94
Taxable Municipal securities [Member]
Available-for-Sale:
Less than 12 Months, Fair Value	1,005	15,601
Less than 12 Months, Unrealized Losses	0	114
12 Months or More, Fair Value	451	880
12 Months or More, Unrealized Losses	2	20
Held-to-Maturity:
Less than 12 Months, Fair Value	0	399
Less than 12 Months, Unrealized Losses	0	1
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Mutual funds [Member]
Available-for-Sale:
Less than 12 Months, Fair Value	0	1,215
Less than 12 Months, Unrealized Losses	0	17
12 Months or More, Fair Value	263	268
12 Months or More, Unrealized Losses	17	34
Trust preferred securities [Member]
Available-for-Sale:
Less than 12 Months, Fair Value	49	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]
Available-for-Sale:
Less than 12 Months, Fair Value	68	248
Less than 12 Months, Unrealized Losses	3	12
12 Months or More, Fair Value	0	73
12 Months or More, Unrealized Losses	$ 0	$ 7