FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans held-for-sale
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	$ 5,600,000	$ 3,000,000	$ 0
Fair Value, Measurements, Nonrecurring | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	(23,000)	(233,000)	(2,600,000)
Fair Value, Measurements, Nonrecurring | Loans held-for-sale
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	(5,565,000)	(1,991,000)	0
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI Impaired Loans
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	(26,212,000)	(9,029,000)	(7,035,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI Impaired Loans | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	1,084,000	(2,747,000)	2,196,000
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI Impaired Loans | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	(27,106,000)	(5,612,000)	(9,169,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI Impaired Loans | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	(224,000)	(611,000)	(61,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI Impaired Loans | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Fair value adjustment of assets	$ 34,000	$ (59,000)	$ (1,000)