FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-sale	$ 26,931	$ 29,238
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-sale	26,931	29,238
Non-PCI impaired loans | Loans Receivable
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	82,657	70,462
Non-PCI impaired loans | Loans Receivable | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	82,657	70,462
Non-PCI impaired loans | Loans Receivable | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	20,904	17,252
Non-PCI impaired loans | Loans Receivable | CRE | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	20,904	17,252
Non-PCI impaired loans | Loans Receivable | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	58,854	35,558
Non-PCI impaired loans | Loans Receivable | C&I | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	58,854	35,558
Non-PCI impaired loans | Loans Receivable | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	2,305	16,472
Non-PCI impaired loans | Loans Receivable | Residential | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	2,305	16,472
Non-PCI impaired loans | Loans Receivable | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	594	1,180
Non-PCI impaired loans | Loans Receivable | Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Non-PCI impaired loans	594	1,180
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	2,760	4,929
OREO | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	$ 2,760	$ 4,929