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NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investment Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Investments [Line Items]
Debt Securities, Held-to-maturity	$ 437,537	$ 178,133
Interest Receivable	69,730	61,507
Debt Securities, Held-to-maturity, Allowance for Credit Loss	8,286	8,571
Debt Securities, Available-for-sale, Allowance for Credit Loss	458	1,105
Investment securities available for sale	5,599,520	6,453,761
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	400	300
Available-for-sale Securities [Member]
Schedule Of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	458	1,105	$ 1,310	$ 0
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	375	308	308	0
Municipal Bonds [Member] | PUERTO RICO
Schedule Of Investments [Line Items]
Debt Securities, Held-to-maturity	165,710
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 8,286	$ 8,571	$ 8,845	$ 0

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