BUSINESS COMBINATIONS (Acquired PCI Loans) (Details) - USD ($) $ in Thousands	Oct. 01, 2015	Mar. 06, 2015
Starbuck Bancshares, Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest payments	$ 98,746
Nonaccretable difference	(26,162)
Cash flows expected to be collected	72,584
Accretable yield	(11,071)
Fair value of PCI loans	$ 61,513
Siuslaw Financial Group, Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest payments		$ 11,134
Nonaccretable difference		(3,238)
Cash flows expected to be collected		7,896
Accretable yield		(2,239)
Fair value of PCI loans		$ 5,657