FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 57,337	$ 99,037	$ 65,971
Investment securities available for sale, Recurring	926,217	641,863	638,321
Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	57,337	99,037	65,971
Investment securities available for sale, Recurring	2,500	2,500	2,500
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale, Recurring	$ 2,500	$ 2,500	$ 2,500
Fair Value Measurements Unobservable Inputs	Credit quality of underlying issuer	Credit quality of underlying issuer	Credit quality of underlying issuer
Valuation Technique	Discounted par values	Discounted par values	Discounted par values
Fair value inputs discount rate range	0.00%	0.00%	0.00%
Fair Value, Measurements, Recurring [Member] | Average Daily Balance [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	0.00%	0.00%	0.00%
Impaired Loans Carried At Fair Value [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	50.00%	90.00%	50.00%
Impaired Loans Carried At Fair Value [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	0.00%	4.00%	0.00%
Impaired Loans Carried At Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 27,859	$ 35,834	$ 30,479
Fair Value Measurements Unobservable Inputs	Collateral discounts and discount rates	Collateral discounts and discount rates	Collateral discounts and discount rates
Valuation Technique	Third party appraisals and discounted cash flows	Third party appraisals and discounted cash flows	Third party appraisals and discounted cash flows
Impaired Loans Carried At Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Average Daily Balance [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	25.00%	28.00%	20.00%
Other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 5,737
Other real estate owned [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 5,737
Other real estate owned [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	43.00%
Other real estate owned [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	0.00%
Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 5,737
Fair Value Measurements Unobservable Inputs	Collateral discounts and estimated costs to sell
Valuation Technique	Third party appraisals, Sales contracts, Broker price opinions
Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Average Daily Balance [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	14.00%
Purchased, non-covered other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 11,538	$ 13,660	$ 15,585
Purchased, non-covered other real estate owned [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 11,538	$ 13,660	$ 15,585
Purchased, non-covered other real estate owned [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	75.00%	94.00%	96.00%
Purchased, non-covered other real estate owned [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	0.00%	22.00%	10.00%
Purchased, non-covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 11,538	$ 13,660	$ 15,585
Fair Value Measurements Unobservable Inputs	Collateral discounts and estimated costs to sell	Collateral discounts and estimated costs to sell	Collateral discounts and estimated costs to sell
Valuation Technique	Third party appraisals	Third party appraisals	Third party appraisals
Purchased, non-covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Average Daily Balance [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	20.00%	18.00%	20.00%
Covered other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 12,203	$ 28,883	$ 19,907
Covered other real estate owned [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 12,203	$ 28,883	$ 19,907
Covered other real estate owned [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	73.00%	90.00%	90.00%
Covered other real estate owned [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	0.00%	10.00%	10.00%
Covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 12,203	$ 28,883	$ 19,907
Fair Value Measurements Unobservable Inputs	Collateral discounts and estimated costs to sell	Collateral discounts and estimated costs to sell	Collateral discounts and estimated costs to sell
Valuation Technique	Third party appraisals	Third party appraisals	Third party appraisals
Covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Average Daily Balance [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	12.00%	12.00%	11.00%