FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 46,500	$ 58,774	$ 56,869
Investment securities available for sale, Recurring	938,763	688,132	897,054
Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	46,500	58,774	56,869
Investment securities available for sale, Recurring	1,500	2,500	2,998
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale, Recurring	$ 1,500	$ 2,500	$ 2,998
Valuation Technique	Discounted par values	Discounted par values	Discounted par values
Fair Value Measurements Unobservable Inputs	Credit quality of underlying issuer	Credit quality of underlying issuer	Credit quality of underlying issuer
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] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 25,830	$ 28,867	$ 27,069
Valuation Technique	Third-party appraisals and discounted cash flows	Third-party appraisals and discounted cash flows	Third-party appraisals and discounted cash flows
Fair Value Measurements Unobservable Inputs	Collateral discounts and discount rates	Collateral discounts and discount rates	Collateral discounts and discount rates
Impaired Loans Carried At Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	100.00%	70.00%	100.00%
Impaired Loans Carried At Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [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] | 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	27.00%	24.00%	29.00%
Other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 1,857		$ 10,456
Other real estate owned [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	1,857		10,456
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	$ 1,857		$ 10,456
Valuation Technique	Third-party appraisals, sales contracts, broker price opinions		Third-party appraisals, sales contracts, broker price opinions
Fair Value Measurements Unobservable Inputs	Collateral discounts and estimated costs to sell		Collateral discounts and estimated costs to sell
Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	90.00%		90.00%
Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	10.00%		10.00%
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	13.00%		13.00%
Purchased, non-covered other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 15,048	$ 13,818	$ 14,333
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	15,048	13,818	14,333
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	$ 15,048	$ 13,818	$ 14,333
Valuation Technique	Third-party appraisals	Third-party appraisals	Third-party appraisals
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
Purchased, non-covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	75.00%	96.00%	69.00%
Purchased, non-covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	10.00%	10.00%	10.00%
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	16.00%	16.00%	19.00%
Covered other real estate owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	$ 3,764	$ 16,089	$ 5,011
Covered other real estate owned [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Disclosure, Nonrecurring	3,764	16,089	5,011
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	$ 3,764	$ 16,089	$ 5,011
Valuation Technique	Third-party appraisals	Third-party appraisals	Third-party appraisals
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
Covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	59.00%	70.00%	74.00%
Covered other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value inputs discount rate range	15.00%	10.00%	0.00%
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	17.00%	9.00%	12.00%