FAIR VALUE - Reconciliation of Fair Value of Assets and Liabilities Measured on Recurring Basis Level 3 (Detail) - Fair Value Inputs Level 3 [Member] - Available for Sale Securities - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 17,238	$ 19,855
Total gains or (losses) (realized/unrealized):
Included in other comprehensive income	(23)	472
Principal repayments and amortization	(509)	(1,519)
Ending balance	$ 16,706	$ 18,808