BORROWINGS (Additional Information on other short-term borrowings) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Additional Information on other Short-Term Borrowings [Line Items]
Balance outstanding at end of year, amount	$ 147,890	$ 154,288
Customer Repurchase Agreements [Member]
Additional Information on other Short-Term Borrowings [Line Items]
Balance outstanding at end of year, amount	147,890	149,288	153,359
Balance outstanding at end of year, weighted average interest rate	0.13%	0.13%	0.13%
Average daily balance outstanding	143,700	147,195	160,589
Average daily balance outstanding, weighted average interest rate	0.13%	0.13%	0.20%
Maximum balance outstanding at any month end	$ 160,317	$ 164,180	$ 178,171