INVESTMENT SECURITIES - INVESTMENT CATEGORY (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available for sale
Less than 12 months Fair Value	$ 190,631	$ 214,038
Less than 12 months Unrealized Losses	(2,213)	(843)
12 months or more Fair Value	19,879	45,783
12 months or more Unrealized Losses	(647)	(901)
Total Fair Value	210,510	259,821
Total Unrealized Losses	$ (2,860)	$ (1,744)
Number of securities held	179	162
Number of securities held in an unrealized loss position	45	34
Held to maturity
Less than 12 months Fair Value	$ 13,821	$ 4,998
Less than 12 months Unrealized Losses	(126)	(2)
12 months or more Fair Value	4,937
12 months or more Unrealized Losses	(63)
Total Fair Value	18,758	4,998
Total Unrealized Losses	(189)	(2)
U.S. Treasury securities and U.S. Government agencies
Available for sale
Less than 12 months Fair Value	138,002	191,584
Less than 12 months Unrealized Losses	(1,107)	(433)
12 months or more Fair Value		9,914
12 months or more Unrealized Losses		(61)
Total Fair Value	138,002	201,498
Total Unrealized Losses	(1,107)	(494)
Held to maturity
Less than 12 months Fair Value	506
Less than 12 months Unrealized Losses	(2)
Total Fair Value	506
Total Unrealized Losses	(2)
Mortgage backed securities - residential
Available for sale
Less than 12 months Fair Value	9,427	5,727
Less than 12 months Unrealized Losses	(122)	(95)
12 months or more Fair Value	4,211
12 months or more Unrealized Losses	(98)
Total Fair Value	13,638	5,727
Total Unrealized Losses	(220)	(95)
Collateralized mortgage obligations
Available for sale
Less than 12 months Fair Value	37,547	6,831
Less than 12 months Unrealized Losses	(690)	(212)
12 months or more Fair Value	15,668	35,869
12 months or more Unrealized Losses	(549)	(840)
Total Fair Value	53,215	42,700
Total Unrealized Losses	(1,239)	(1,052)
Held to maturity
Less than 12 months Fair Value	13,315
Less than 12 months Unrealized Losses	(124)
Total Fair Value	13,315
Total Unrealized Losses	(124)
Community Reinvestment Act mutual fund
Available for sale
Less than 12 months Fair Value	2,455
Less than 12 months Unrealized Losses	(45)
Total Fair Value	2,455
Total Unrealized Losses	(45)
Corporate bonds
Available for sale
Less than 12 months Fair Value		9,896
Less than 12 months Unrealized Losses		(103)
Total Fair Value		9,896
Total Unrealized Losses		(103)
Held to maturity
Less than 12 months Fair Value		4,998
Less than 12 months Unrealized Losses		(2)
12 months or more Fair Value	4,937
12 months or more Unrealized Losses	(63)
Total Fair Value	4,937	4,998
Total Unrealized Losses	(63)	$ (2)
Trust preferred security
Available for sale
Less than 12 months Fair Value	3,200
Less than 12 months Unrealized Losses	(249)
Total Fair Value	3,200
Total Unrealized Losses	$ (249)