PREMISES AND EQUIPMENT: (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment, Gross [Abstract]
Depreciation	$ 4,340	$ 4,660	$ 4,980
Rent expense	$ 900	$ 900	$ 900