INVESTMENT SECURITIES, AMORTIZED COST AND FAIR VALUE (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment Securities Available-for-Sale:
Amortized Cost	$ 324,662	$ 377,267
Unrealized Gains	1,129	2,739
Unrealized Losses	5,132	2,028
Fair Value	320,659	377,978
Investment Securities Held-to-Maturity:
Amortized Cost	41,003	22,633
Unrealized Gains	56	95
Unrealized Losses	569	98
Fair Value	40,490	22,630
U.S. Treasury notes
Investment Securities Available-for-Sale:
Amortized Cost	28,180	72,672
Unrealized Gains	41	309
Unrealized Losses	76	135
Fair Value	28,145	72,846
U.S. Agency notes
Investment Securities Available-for-Sale:
Amortized Cost	87,098	140,876
Unrealized Gains	150	164
Unrealized Losses	1,848	1,151
Fair Value	85,400	139,889
U.S. Agency mortgage-backed securities
Investment Securities Available-for-Sale:
Amortized Cost	72,402	29,608
Unrealized Gains	89	174
Unrealized Losses	1,444	404
Fair Value	71,047	29,378
Investment Securities Held-to-Maturity:
Amortized Cost	0
Fair Value	0
Certificates of deposit
Investment Securities Available-for-Sale:
Amortized Cost		248
Unrealized Gains		1
Unrealized Losses		0
Fair Value		249
Non-taxable municipal securities
Investment Securities Available-for-Sale:
Amortized Cost	114,064	103,900
Unrealized Gains	574	1,713
Unrealized Losses	1,623	134
Fair Value	113,015	105,479
Investment Securities Held-to-Maturity:
Amortized Cost	31,015	22,233
Unrealized Gains	56	95
Unrealized Losses	352	97
Fair Value	30,719	22,231
Taxable municipal securities
Investment Securities Available-for-Sale:
Amortized Cost	19,710	26,738
Unrealized Gains	220	337
Unrealized Losses	85	134
Fair Value	19,845	26,941
Investment Securities Held-to-Maturity:
Amortized Cost	9,988	400
Unrealized Gains	0	0
Unrealized Losses	217	1
Fair Value	9,771	399
Mutual funds
Investment Securities Available-for-Sale:
Amortized Cost	2,527	2,517
Unrealized Gains	0	0
Unrealized Losses	45	51
Fair Value	2,482	2,466
Investment Securities Held-to-Maturity:
Amortized Cost	0
Fair Value	0
Trust preferred securities
Investment Securities Available-for-Sale:
Amortized Cost	49	49
Unrealized Gains	0	1
Unrealized Losses	1	0
Fair Value	48	50
Investment Securities Held-to-Maturity:
Amortized Cost	0
Fair Value	0
Equity securities
Investment Securities Available-for-Sale:
Amortized Cost	632	659
Unrealized Gains	55	40
Unrealized Losses	10	19
Fair Value	677	$ 680
Investment Securities Held-to-Maturity:
Amortized Cost	0
Fair Value	$ 0

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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