FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 5) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	$ 7,275	$ 17,521
Loans held for sale	33,441
Loans Receivable | Non-PCI loans
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	81,817	67,811
Loans Receivable | Non-PCI loans | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	16,516	26,089
Loans Receivable | Non-PCI loans | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	46,772	16,581
Loans Receivable | Non-PCI loans | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	17,343	25,034
Loans Receivable | Non-PCI loans | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	1,186	107
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held for sale	33,441
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	7,275	17,521
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	81,817	67,811
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	16,516	26,089
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	46,772	16,581
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	17,343	25,034
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	$ 1,186	$ 107