BANK PREMISES AND EQUIPMENT, NET (Bank Premises and Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 282,756	$ 280,760
Accumulated depreciation and amortization	(158,428)	(153,240)
Bank premises and equipment, net	124,328	127,520
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	32,631	33,324
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	134,862	134,428
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	100,688	99,116
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	11,855	12,014
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,720	$ 1,878