FAIR VALUE ACCOUNTING AND MEASUREMENT (Non-recurring Basis) (Details) - Class of Financing Receivable [Domain] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans individually evaluated for impairment	$ 31,782,000	$ 44,631,000	$ 31,782,000	$ 44,631,000
Write-downs on loans individually evaluated for impairment	1,242,000	1,666,000	2,431,000	3,194,000
Allowance on loans individually evaluated for impairment	2,395,000	4,323,000	2,395,000	4,323,000
Loans collectively evaluated for impairment	4,209,266,000	3,717,968,000	4,209,266,000	3,717,968,000
Allowance on loans collectively evaluated for impairment	74,934,000	69,987,000	74,934,000	$ 69,987,000
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Classifed loans	63,000,000		63,000,000
Write-downs on loans individually evaluated for impairment			2,000,000
Impairment of real estate owned	$ 182,000	$ 0	$ 182,000