DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 1,347	$ 22,037
Financial Instruments	1,347	1,378
Cash Collateral	0	20,545
Net Amount	0	114
Interest rate contracts - designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	807	9,256
Financial Instruments	807	843
Cash Collateral	0	8,413
Net Amount	0	0
Interest rate swaps - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	491	12,720
Financial Instruments	491	474
Cash Collateral	0	12,132
Net Amount	0	114
Equity contracts - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	49	61
Financial Instruments	49	61
Cash Collateral	0	0
Net Amount	$ 0	$ 0