SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE - Narratives (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Line Items]
Maximum aggregate balance outstanding	$ 300,000	$ 300,000
Repurchase Agreements [Member]
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Line Items]
Accrued interest payable on repurchase agreements	1,900	1,000
Maximum [Member]
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Line Items]
Maximum aggregate balance outstanding	300,000	475,800
Weighted Average [Member]
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Line Items]
Average balance outstanding	$ 300,500	$ 291,500
Weighted Average [Member] | Repurchase Agreements [Member]
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Line Items]
Weighted-average interest rate during the year	3.32%	2.28%