LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 7) - Loans Receivable - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Modifications [Line Items]
Period beyond which a TDR generally becomes delinquent	90 days
Non-PCI loans
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 41,084	$ 1,278
Non-PCI loans | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	33,507	445
Non-PCI loans | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	833
Non-PCI loans | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,615	0
Non-PCI loans | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,962	0
Non-PCI loans | CRE
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	13,753	833
Non-PCI loans | CRE | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	13,725	0
Non-PCI loans | CRE | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	833
Non-PCI loans | CRE | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | CRE | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	28	0
Non-PCI loans | C&I
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	26,715	164
Non-PCI loans | C&I | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	19,166	164
Non-PCI loans | C&I | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | C&I | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,615	0
Non-PCI loans | C&I | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,934	0
Non-PCI loans | Residential
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	273	281
Non-PCI loans | Residential | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	273	281
Non-PCI loans | Residential | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Residential | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Residential | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	343	0
Non-PCI loans | Consumer | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	343	0
Non-PCI loans | Consumer | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 0	$ 0