PREMISES AND EQUIPMENT (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($) N	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2011 USD ($)
Depreciation		$ 3,275	$ 3,093	$ 3,921
Depreciation expense on leased assets		607	607	607
Gain on leaseback transaction of Gladstone property deferred					$ 764
Charge to operations for closings				1,735
Facility Closing [Member]
Depreciation	$ 723
Number of stores closed | N	2
Charge to operations for closings	$ 2,500
Gladstone Property [Member]
Depreciation		$ 141	$ 141	$ 141