GOODWILL AND OTHER INTANGIBLE ASSETS (Net Carrying Amount of Goodwill By Segment) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Beginning balance	$ 84,171	$ 84,171
Acquisition fair value adjustment	0	0
Ending balance	84,171	84,171
Community Banking
Goodwill [Line Items]
Beginning balance	69,991	69,991
Acquisition fair value adjustment	0	0
Ending balance	69,991	69,991
Insurance
Goodwill [Line Items]
Beginning balance	5,191	5,191
Acquisition fair value adjustment	0	0
Ending balance	5,191	5,191
Investment Management
Goodwill [Line Items]
Beginning balance	8,989	8,989
Acquisition fair value adjustment	0	0
Ending balance	$ 8,989	$ 8,989