PREMISES AND EQUIPMENT: (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment, Gross [Abstract]
Land	$ 11,423	$ 10,391
Building and leasehold improvements	54,353	49,418
Furniture and equipment	42,546	41,096
Property Plant And Equipment Gross	108,322	100,905
Less accumulated depreciation	(56,873)	(53,597)
TOTAL	$ 51,449	$ 47,308