COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) (USD $)	0 Months Ended
	Jan. 14, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks, liability		$ 774,346,000	$ 597,672,000
Unused lines of credit		65,000,000
Federal Home Loan Bank unused borrowing capacity		596,900,000
Federal Reserve Bank unused borrowing capacity		10,400,000
Federal Reserve required average total reserve		47,600,000
Required deposit with Federal Reserve Bank of New York		0
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, lower range		0
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, upper range		1,000,000
Legal settlement, amount	2,500,000
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks, liability		750,178,000	572,393,000
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks, liability		$ 24,168,000	$ 25,279,000