RISK MANAGEMENT AND DERIVATIVE INSTRUMENTS - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Jan. 30, 2015	Sep. 30, 2013
Derivative [Line Items]
Cash collateral pledged	$ 660,000		$ 660,000		$ 590,000
Interest Rate Swap Maturing on September 27, 2018 | Cash Flow Hedging
Derivative [Line Items]
Derivatives, notional amount							$ 50,000,000
Termination of derivatives			50,000,000
Interest Rate Swap Maturing on January 30, 2022 | Cash Flow Hedging
Derivative [Line Items]
Derivatives, notional amount						$ 25,000,000
Interest rate swaps on deposits and other borrowings
Derivative [Line Items]
Derivatives asset, fair values		$ 918,000		$ 918,000
Loss on derivative instruments			576,000
Net Revenue on Mortgage Banking Activities
Derivative [Line Items]
Derivatives gain (loss)	(4,700,000)	$ (2,700,000)	(16,000,000)	$ (5,400,000)
Other Income | Foreign exchange contracts
Derivative [Line Items]
Derivatives gain (loss)	$ 65,000		$ 65,000