FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 6) (Fair Value, Measurements, Nonrecurring, Significant Unobservable Inputs (Level 3), USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Quantitative information
Non-covered impaired loans	$ 56,514		$ 57,751
Non-covered impaired loans
Quantitative information
Non-covered impaired loans	56,514		57,751
Non-covered impaired loans | Market comparables | Low end of range
Quantitative information
Discount rate (as a percent)	0.00%	[1]	0.00%	[1]
Non-covered impaired loans | Market comparables | High end of range
Quantitative information
Discount rate (as a percent)	100.00%	[1]	100.00%	[1]
Non-covered impaired loans | Market comparables | Weighted Average
Quantitative information
Discount rate (as a percent)	15.00%	[1]	13.00%	[1]
Non-covered OREO
Quantitative information
Non-covered OREO	15,556		13,031
Non-covered OREO | Appraisal
Quantitative information
Selling cost (as a percent)	8.00%		8.00%
Non-covered OREO | Appraisal | Weighted Average
Quantitative information
Selling cost (as a percent)	8.00%		8.00%
Covered OREO
Quantitative information
Covered OREO	$ 2,400		$ 17,284

[1] Discount rate is adjusted for factors such as liquidation cost of collateral and selling cost.