SECURITIES (Securities with Continuous Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 181,897	$ 637,744
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(735)	(5,270)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	54,565	89,748
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(462)	(1,085)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	236,462	727,492
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(1,197)	(6,355)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	5,568	63,038
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	14	511
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	509
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(5)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	5,568	63,547
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	14	516
U.S. Government and agency obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	5,784	8,707
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(16)	(97)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,078	10,489
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(12)	(96)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,862	19,196
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(28)	(193)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	1,074
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	1,074
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	2
Municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	18,503	69,848
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(67)	(426)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,060	905
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2)	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	19,563	70,753
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(69)	(432)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	4,494	28,545
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	12	188
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	254
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(3)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	4,494	28,799
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	12	191
Corporate bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	5,334	5,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(52)	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,334	5,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(52)	(12)
Mortgage-backed or related securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	152,276	533,143
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(600)	(4,380)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	32,760	68,562
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(186)	(735)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	185,036	601,705
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(786)	(5,115)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		34,493
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		323
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		255
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(2)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		34,748
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss		325
Asset-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	20,893
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(355)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	19,667	9,792
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(262)	(248)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	19,667	30,685
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (262)	$ (603)