DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 10,907	$ 13,581
Financial Instruments	10,600	12,922
Cash Collateral	0	0
Net Amount	307	659
Interest rate contracts - designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	4,760	1,982
Financial Instruments	4,760	1,982
Cash Collateral	0	0
Net Amount	0	0
Interest rate swaps - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	6,147	11,599
Financial Instruments	5,840	10,940
Cash Collateral	0	0
Net Amount	307	659
Equity contracts - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 0	$ 0