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DEBT SECURITIES - Investment Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 344,435		$ 354,178
Held to Maturity Gross Unrecognized gains	4,715		4,811
Held to Maturity Gross Unrecognized losses	15,460		12,857
Held to Maturity Fair value	333,690		346,132
Allowance for credit losses, Held-to-Maturity securities	$ 1,267		$ 2,197
Held to Maturity Weighted-average yield	4.86%		4.84%
Interest receivable	$ 77,895		$ 77,716
Held-to-maturity Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Interest receivable	4,800		4,800
Municipal Bonds [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Due Withing One Year	3,178		3,165
Held to Maturity Gross Unrecognized gain Due Within One Year	0		8
Held to Maturity Gross Unrecognized losses Due Within One Year	18		38
Held to Maturity Fair value Due Within One Year	3,160		3,135
Allowance for credit losses Due within one year	$ 37		$ 50
Held to Maturity Weighted-average yield Due withing One Year	9.30%		9.30%
Held to Maturity Amortized Cost After 1 to 5 years	$ 51,424		$ 51,230
Held to Maturity Gross Unrecognized gains After 1 to 5 years	972		994
Held to Maturity Gross Unrecognized losses After 1 to 5 years	620		710
Held to Maturity Fair value After 1 to 5 years	51,776		51,514
Allowance for credit losses After 1 to 5 years	$ 468		$ 1,266
Held to Maturity Weighted-average yield After 1 to 5 years	7.72%		7.78%
Held to Maturity Amortized Cost After 5 to 10 years	$ 36,253		$ 36,050
Held to Maturity Gross Unrecognized gains After 5 to 10 years	3,393		3,540
Held to Maturity Gross Unrecognized losses After 5 to 10 years	201		210
Held to Maturity Fair value After 5 to 10 years	39,445		39,380
Allowance for credit losses After 5 to 10 years	$ 451		$ 604
Held to Maturity Weighted-average yield After 5 to 10 years	7.03%		7.13%
Held to Maturity Amortized Cost After 10 years	$ 16,595		$ 16,595
Held to Maturity Gross Unrecognized gains After 10 years	350		269
Held to Maturity Gross Unrecognized losses After 10 years	0		0
Held to Maturity Fair value After 10 years	16,945		16,864
Allowance for credit losses After 10 years	$ 311		$ 277
Held to Maturity Weighted-average yield After 10 years	8.78%		8.87%
Held To Maturity Securities Amortized	$ 107,450		$ 107,040
Held to Maturity Gross Unrecognized gains	4,715		4,811
Held to Maturity Gross Unrecognized losses	839		958
Held to Maturity Fair value	111,326		110,893
Allowance for credit losses, Held-to-Maturity securities	$ 1,267	$ 1,235	$ 2,197	$ 8,401	$ 7,646	$ 8,286
Held to Maturity Weighted-average yield	7.70%		7.78%
Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 138,615		$ 146,468
Held to Maturity Gross Unrecognized gains	0		0
Held to Maturity Gross Unrecognized losses	8,242		5,819
Held to Maturity Fair value	130,373		140,649
Allowance for credit losses, Held-to-Maturity securities	$ 0		$ 0
Held to Maturity Weighted-average yield	3.86%		3.84%
Commercial MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 1 to 5 years	$ 9,352		$ 9,444
Held to Maturity Gross Unrecognized gains After 1 to 5 years	0		0
Held to Maturity Gross Unrecognized losses After 1 to 5 years	301		297
Held to Maturity Fair value After 1 to 5 years	9,051		9,147
Allowance for credit losses After 1 to 5 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 1 to 5 years	3.48%		3.48%
Held to Maturity Amortized Cost After 10 years	$ 89,018		$ 91,226
Held to Maturity Gross Unrecognized gains After 10 years	0		0
Held to Maturity Gross Unrecognized losses After 10 years	6,078		5,783
Held to Maturity Fair value After 10 years	82,940		85,443
Allowance for credit losses After 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 10 years	3.15%		3.15%
Held To Maturity Securities Amortized	$ 98,370		$ 100,670
Held to Maturity Gross Unrecognized gains	0		0
Held to Maturity Gross Unrecognized losses	6,379		6,080
Held to Maturity Fair value	91,991		94,590
Allowance for credit losses, Held-to-Maturity securities	$ 0		$ 0
Held to Maturity Weighted-average yield	3.18%		3.18%
MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 236,985		$ 247,138
Held to Maturity Gross Unrecognized gains	0		0
Held to Maturity Gross Unrecognized losses	14,621		11,899
Held to Maturity Fair value	222,364		235,239
Allowance for credit losses, Held-to-Maturity securities	$ 0		$ 0
Held to Maturity Weighted-average yield	3.58%		3.57%
Unisured Portion Of Government Deposits [Member] | Asset Pledged as Collateral [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held To Maturity Securities Amortized	$ 189,700		$ 126,600
Held to Maturity Fair value	184,400		125,900
FHLMC [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 5 to 10 years	14,243		16,469
Held to Maturity Gross Unrecognized gains After 5 to 10 years	0		0
Held to Maturity Gross Unrecognized losses After 5 to 10 years	578		556
Held to Maturity Fair value After 5 to 10 years	13,665		15,913
Allowance for credit losses After 5 to 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 5 to 10 years	3.03%		3.03%
Held to Maturity Amortized Cost After 10 years	$ 17,879		$ 18,324
Held to Maturity Gross Unrecognized gains After 10 years	0		0
Held to Maturity Gross Unrecognized losses After 10 years	1,146		714
Held to Maturity Fair value After 10 years	16,733		17,610
Allowance for credit losses After 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 10 years	4.35%		4.32%
Held To Maturity Securities Amortized	$ 32,122		$ 34,793
Held to Maturity Gross Unrecognized gains	0		0
Held to Maturity Gross Unrecognized losses	1,724		1,270
Held to Maturity Fair value	30,398		33,523
Allowance for credit losses, Held-to-Maturity securities	$ 0		$ 0
Held to Maturity Weighted-average yield	3.76%		3.71%
GNMA [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 15,047		$ 16,265
Held to Maturity Gross Unrecognized gains After 10 years	0		0
Held to Maturity Gross Unrecognized losses After 10 years	951		789
Held to Maturity Fair value After 10 years	14,096		15,476
Allowance for credit losses After 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 10 years	3.30%		3.32%
FNMA [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 64,591		$ 67,271
Held to Maturity Gross Unrecognized gains After 10 years	0		0
Held to Maturity Gross Unrecognized losses After 10 years	3,927		2,486
Held to Maturity Fair value After 10 years	60,664		64,785
Allowance for credit losses After 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 10 years	4.19%		4.18%
CMOs issued or guaranteed by the FHLMC, FNMA, and GNMA: [Member] | Residential MBS [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held to Maturity Amortized Cost After 10 years	$ 26,855		$ 28,139
Held to Maturity Gross Unrecognized gains After 10 years	0		0
Held to Maturity Gross Unrecognized losses After 10 years	1,640		1,274
Held to Maturity Fair value After 10 years	25,215		26,865
Allowance for credit losses After 10 years	$ 0		$ 0
Held to Maturity Weighted-average yield After 10 years	3.49%		3.49%

X

- Definition

Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in sixth fiscal year through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Weighted average yield of investment in debt security measured at amortized cost (held-to-maturity) maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Weighted average yield of investment in debt security measured at amortized cost (held-to-maturity) maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Weighted average yield of investment in debt security measured at amortized cost (held-to-maturity) maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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