SECURITIES (Schedule of Unrealized Gross Losses and Estimated Fair values of Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value - Less Than 12 Months	$ 156,166	$ 120,364
Unrealized Losses - Less Than 12 Months	(1,748)	(611)
Fair Value - 12 Months of More	213,320	307,951
Unrealized Losses - 12 Months or More	(5,734)	(7,313)
Fair Value	369,486	428,315
Unrealized losses	(7,482)	(7,924)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	40,243	5,756
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(702)	(19)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	40,243	5,756
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(702)	(19)
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Fair Value - Less Than 12 Months	120,190	42,856
Unrealized Losses - Less Than 12 Months	(1,360)	(171)
Fair Value - 12 Months of More	58,881	125,439
Unrealized Losses - 12 Months or More	(1,859)	(1,834)
Fair Value	179,071	168,295
Unrealized losses	(3,219)	(2,005)
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Fair Value - Less Than 12 Months	34,272	75,723
Unrealized Losses - Less Than 12 Months	(312)	(432)
Fair Value - 12 Months of More	154,439	182,512
Unrealized Losses - 12 Months or More	(3,875)	(5,479)
Fair Value	188,711	258,235
Unrealized losses	(4,187)	(5,911)
Private issue collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Fair Value - Less Than 12 Months	1,704	1,785
Unrealized Losses - Less Than 12 Months	(76)	(8)
Fair Value - 12 Months of More	0	0
Unrealized Losses - 12 Months or More	0	0
Fair Value	1,704	1,785
Unrealized losses	(76)	(8)
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	40,243	5,756
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(702)	(19)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	40,243	5,756
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (702)	$ (19)