DEBT SECURITIES - Investments Securities Held to Maturity (Securities in continuous unrealized loss position) (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	$ 0	$ 260,106
HTM Unrealized Losses Less than 12 months	0	11,721
HTM Fair Value 12 months or more	269,921	98,797
HTM Unrealized Losses 12 months or more	12,857	2,769
HTM Fair Value	269,921	358,903
HTM Unrealized Losses	12,857	14,490
Municipal Bonds [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	0
HTM Unrealized Losses Less than 12 months	0	0
HTM Fair Value 12 months or more	34,682	98,797
HTM Unrealized Losses 12 months or more	958	2,769
HTM Fair Value	34,682	98,797
HTM Unrealized Losses	958	2,769
Commercial MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	100,523
HTM Unrealized Losses Less than 12 months	0	4,565
HTM Fair Value 12 months or more	94,590	0
HTM Unrealized Losses 12 months or more	6,080	0
HTM Fair Value	94,590	100,523
HTM Unrealized Losses	6,080	4,565
FHLMC [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	39,171
HTM Unrealized Losses Less than 12 months	0	1,634
HTM Fair Value 12 months or more	33,523	0
HTM Unrealized Losses 12 months or more	1,270	0
HTM Fair Value	33,523	39,171
HTM Unrealized Losses	1,270	1,634
GNMA [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	18,188
HTM Unrealized Losses Less than 12 months	0	943
HTM Fair Value 12 months or more	15,476	0
HTM Unrealized Losses 12 months or more	789	0
HTM Fair Value	15,476	18,188
HTM Unrealized Losses	789	943
FNMA [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	69,192
HTM Unrealized Losses Less than 12 months	0	3,155
HTM Fair Value 12 months or more	64,785	0
HTM Unrealized Losses 12 months or more	2,486	0
HTM Fair Value	64,785	69,192
HTM Unrealized Losses	2,486	3,155
CMOs issued or guaranteed by the FHLMC, FNMA, and GNMA: [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
HTM Fair Value Less than 12 months	0	33,032
HTM Unrealized Losses Less than 12 months	0	1,424
HTM Fair Value 12 months or more	26,865	0
HTM Unrealized Losses 12 months or more	1,274	0
HTM Fair Value	26,865	33,032
HTM Unrealized Losses	$ 1,274	$ 1,424