BRANCH DIVESTITURES AND RESTRUCTURING CHARGES (Textual) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) offices	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) offices	Jun. 30, 2014 USD ($)
Branch Divestitures and Restructuring Charges [Line Items]
Restructuring charges on retail branch offices and other facilities	$ 11,884	$ 0	$ 17,579	$ 0
Retail branch offices [Member]
Branch Divestitures and Restructuring Charges [Line Items]
Restructuring charges on retail branch offices and other facilities	4,600		4,600
Former retail branch offices and other facilities [Member]
Branch Divestitures and Restructuring Charges [Line Items]
Restructuring charges on retail branch offices and other facilities	$ 6,500		$ 12,200
Napa, Brentwood, Fairfield California Branches [Member]
Branch Divestitures and Restructuring Charges [Line Items]
Number of branch offices to be sold pursuant to sales agreement | offices	3		3
Deposits to be assumed pursuant to sales agreement	$ 74,000		$ 74,000
Loans to be purchased pursuant to sales agreement	11,600		11,600
Premises and equipment to be purchased pursuant to sales agreement	$ 3,100		$ 3,100
Bradenton, Palmetto, Longboat Key Florida Branches [Member]
Branch Divestitures and Restructuring Charges [Line Items]
Number of branch offices to be sold pursuant to sales agreement | offices	8		8
Deposits to be assumed pursuant to sales agreement	$ 155,000		$ 155,000
Loans to be purchased pursuant to sales agreement	30,900		30,900
Premises and equipment to be purchased pursuant to sales agreement	$ 6,400		$ 6,400