Debt Securities Held-to-maturity -Additional Information (Details)	Dec. 31, 2022 USD ($) score	Dec. 31, 2021 USD ($) score	Dec. 31, 2020 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities	$ 9,356,739,000	$ 79,461,000
Allowance for credit losses	6,911,000	8,096,000
Obligations of Puerto Rico, States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities	65,921,000	73,476,000
Allowance for credit losses	$ 6,911,000	$ 8,096,000	$ 10,261,000
Average Credit Score Fico | score	707	704
Percentage of nominal value	65.00%	64.00%
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities	$ 24,660,000	$ 30,145,000
Allowance for credit losses	300,000	300,000
Obligations of Puerto Rico, States and political subdivisions | Munis Not Guaranteed By Puerto Rico Central Government
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities	42,000,000	43,000,000
Allowance for credit losses	6,600,000	7,800,000
Past due
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities	$ 0	$ 0