SHORT-TERM BORROWINGS - Summary of the Use of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Balance at year-end	$ 146,600	$ 55,000	$ 50,000
Weighted average interest rate at year-end	1.87%	2.76%	1.21%
Average balance during the year	$ 23,171	$ 71,457	$ 54,610
Average interest rate during the year	2.20%	2.09%	1.08%
Maximum month-end balance during the year	$ 146,600	$ 103,000	$ 72,000