FAIR VALUE - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization Rates Utilized To Determine Fair Value Of Underlying Collateral Averaged Percentage	7.80%
Loans and Leases Receivable, Allowance	$ 26,000	$ 24,562	$ 23,400	$ 20,725	$ 19,724	$ 19,128
Loans Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	100
Other Real Estate Owned And Other Reductions	600
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	400
Other Real Estate Revenue	2,900
Loans Receivable, Fair Value Disclosure	10,700		4,100
Loans and Leases Receivable, Allowance	600		$ 400
Other Real Estate, Disposals	3,100
Other Real Estate, Improvements	$ 1,200