DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Offsetting of Derivative Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Gross Amount	$ 44,159	$ 54,220
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	44,159	54,220
Interest rate lock commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	5,437
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0
Net Amount Presented in the Balance Sheet	5,437
Forward delivery commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	574
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0
Net Amount Presented in the Balance Sheet	574
Credit risk contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	26	13
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	26	13
Subject to Master Netting Arrangements [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	1,360	22,037
Subject to Master Netting Arrangements [Member] | Interest rate contracts - designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	862	9,256
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	862	9,256
Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	472	12,720
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	472	12,720
Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	26	61
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	26	61
Not Subject to Master Netting Arrangements [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	42,799	32,183
Not Subject to Master Netting Arrangements [Member] | Interest rate lock commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	5,437	0
Not Subject to Master Netting Arrangements [Member] | Forward delivery commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	574	0
Not Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	36,762	32,170
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	36,762	32,170
Not Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	0	0
Not Subject to Master Netting Arrangements [Member] | Credit risk contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	$ 26	$ 13