COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) ClassAction	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($)
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	$ 835,838		$ 830,495
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, lower range	0
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, upper range	$ 1,000
Number of class actions in which the Bank is involved | ClassAction	2
Legal settlement charge		$ 2,800
Commitments to Extend Credit [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	$ 816,468		811,442
Standby Letters of Credit [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	$ 19,370		$ 19,053