INVESTMENT SECURITIES, CONTINUOUS UNREALIZED LOSS POSITION (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	$ 234,467	$ 186,285
Less Than 12 Months, Unrealized Losses	4,985	1,548
12 Months or More, Fair Value	4,696	27,041
12 Months or More, Unrealized Losses	147	480
Investment Securities Held-to-Maturity:
Less Than 12 Months, Fair Value	28,459	1,231
Less Than 12 Months, Unrealized Losses	468	4
12 Months or More, Fair Value	2,564	3,426
12 Months or More, Unrealized Losses	101	94
U.S. Treasury notes
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	16,076	32,854
Less Than 12 Months, Unrealized Losses	76	75
12 Months or More, Fair Value	0	4,846
12 Months or More, Unrealized Losses	0	60
U.S. Agency notes
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	69,784	104,053
Less Than 12 Months, Unrealized Losses	1,848	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
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	64,564	19,190
Less Than 12 Months, Unrealized Losses	1,310	256
12 Months or More, Fair Value	3,518	4,068
12 Months or More, Unrealized Losses	134	148
Non-taxable Municipal Securities
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	72,867	13,124
Less Than 12 Months, Unrealized Losses	1,621	74
12 Months or More, Fair Value	451	7,037
12 Months or More, Unrealized Losses	2	60
Investment Securities Held-to-Maturity:
Less Than 12 Months, Fair Value	20,429	832
Less Than 12 Months, Unrealized Losses	251	3
12 Months or More, Fair Value	2,564	3,426
12 Months or More, Unrealized Losses	101	94
Taxable Municipal Securities
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	9,721	15,601
Less Than 12 Months, Unrealized Losses	82	114
12 Months or More, Fair Value	450	880
12 Months or More, Unrealized Losses	3	20
Investment Securities Held-to-Maturity:
Less Than 12 Months, Fair Value	8,030	399
Less Than 12 Months, Unrealized Losses	217	1
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Mutual funds
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	1,205	1,215
Less Than 12 Months, Unrealized Losses	37	17
12 Months or More, Fair Value	277	268
12 Months or More, Unrealized Losses	8	34
Trust preferred securities
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	49	0
Less Than 12 Months, Unrealized Losses	1	0
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Equity securities
Investment Securities Available-for-Sale:
Less Than 12 Months, Fair Value	201	248
Less Than 12 Months, Unrealized Losses	10	12
12 Months or More, Fair Value	0	73
12 Months or More, Unrealized Losses	$ 0	$ 7