SECURITIES (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available for sale:
Less than 12 months, Fair Value	$ 400,673	$ 671,551
Less than 12 months, Unrealized losses	(4,197)	(12,400)
Greater than 12 months, Fair Value	270,870	57,415
Greater than 12 months, Unrealized losses	(6,835)	(2,825)
Held to maturity:
Less than 12 months, Fair Value	49,233	101,846
Less than 12 months, Unrealized losses	(544)	(1,530)
Greater than 12 months, Fair Value	34,994	13,540
Greater than 12 months, Unrealized losses	(960)	(521)
U.S. GSE securities
Available for sale:
Less than 12 months, Fair Value	37,659	63,649
Less than 12 months, Unrealized losses	(334)	(1,344)
Greater than 12 months, Fair Value	26,568	0
Greater than 12 months, Unrealized losses	(432)	0
State and municipal obligations
Available for sale:
Less than 12 months, Fair Value	27,585	78,883
Less than 12 months, Unrealized losses	(146)	(1,338)
Greater than 12 months, Fair Value	25,204	240
Greater than 12 months, Unrealized losses	(323)	(1)
Held to maturity:
Less than 12 months, Fair Value	2,828	21,867
Less than 12 months, Unrealized losses	(29)	(130)
Greater than 12 months, Fair Value	1,015	0
Greater than 12 months, Unrealized losses	(7)	0
U.S. GSE residential mortgage-backed securities
Available for sale:
Less than 12 months, Fair Value	129,703	140,514
Less than 12 months, Unrealized losses	(1,162)	(2,409)
Greater than 12 months, Fair Value	25,682	241
Greater than 12 months, Unrealized losses	(608)	(5)
Held to maturity:
Less than 12 months, Fair Value	5,326	13,156
Less than 12 months, Unrealized losses	(57)	(287)
Greater than 12 months, Fair Value	6,404	0
Greater than 12 months, Unrealized losses	(118)	0
U.S. GSE residential collateralized mortgage obligations
Available for sale:
Less than 12 months, Fair Value	178,035	319,197
Less than 12 months, Unrealized losses	(2,174)	(5,221)
Greater than 12 months, Fair Value	114,900	15,627
Greater than 12 months, Unrealized losses	(2,126)	(515)
Held to maturity:
Less than 12 months, Fair Value	14,488	31,297
Less than 12 months, Unrealized losses	(183)	(455)
Greater than 12 months, Fair Value	8,941	3,873
Greater than 12 months, Unrealized losses	(165)	(97)
U.S. GSE commercial mortgage-backed securities
Available for sale:
Less than 12 months, Fair Value	2,455	2,573
Less than 12 months, Unrealized losses	(17)	(36)
Greater than 12 months, Fair Value	0	0
Greater than 12 months, Unrealized losses	0	0
Held to maturity:
Less than 12 months, Fair Value	12,806	12,860
Less than 12 months, Unrealized losses	(166)	(286)
Greater than 12 months, Fair Value	5,679	5,877
Greater than 12 months, Unrealized losses	(184)	(223)
U.S. GSE commercial collateralized mortgage obligations
Available for sale:
Less than 12 months, Fair Value	25,236	48,901
Less than 12 months, Unrealized losses	(364)	(886)
Greater than 12 months, Fair Value	25,151	6,292
Greater than 12 months, Unrealized losses	(461)	(70)
Held to maturity:
Less than 12 months, Fair Value	13,785	22,666
Less than 12 months, Unrealized losses	(109)	(372)
Greater than 12 months, Fair Value	12,955	3,790
Greater than 12 months, Unrealized losses	(486)	(201)
Other asset backed securities
Available for sale:
Less than 12 months, Fair Value	0	0
Less than 12 months, Unrealized losses	0	0
Greater than 12 months, Fair Value	23,037	22,552
Greater than 12 months, Unrealized losses	(1,213)	(1,697)
Corporate bonds
Available for sale:
Less than 12 months, Fair Value	0	17,834
Less than 12 months, Unrealized losses	0	(1,166)
Greater than 12 months, Fair Value	30,328	12,463
Greater than 12 months, Unrealized losses	$ (1,672)	$ (537)