DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Key Data Related to Interest Rate (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 5,425,405	$ 4,005,212
Fair value included in other assets	43,477	54,220
Fair value included in other liabilities	25,428	47,267
Designated as Hedging Instrument [Member] | Interest rate contracts - designated [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	705,000	450,000
Fair value included in other assets	807	9,256
Designated as Hedging Instrument [Member] | Trading Liabilities [Member] | Interest rate contracts - designated [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value included in other liabilities	1,248	1,171
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	4,122,006	3,378,314
Fair value included in other assets	37,305	44,890
Not Designated as Hedging Instrument [Member] | Trading Liabilities [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value included in other liabilities	$ 23,723	$ 45,912