Commitments and Contingencies - Schedule of Direct Exposure to Puerto Rico Government by Maturity (Details) - PR Government direct exposure - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	$ 363,091	$ 333,000
Total concentration of risk	388,091	362,000
Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	15,566	19,000
Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	347,525	$ 314,000
Central Government
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	46
Total concentration of risk	46
Central Government | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	46
Central Government | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	0
Central Government | After 1 to 5 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	3
Total concentration of risk	3
Central Government | After 1 to 5 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	3
Central Government | After 1 to 5 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	0
Central Government | After 5 to 10 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	1
Total concentration of risk	1
Central Government | After 5 to 10 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	1
Central Government | After 5 to 10 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	0
Central Government | After 10 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	42
Total concentration of risk	42
Central Government | After 10 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	42
Central Government | After 10 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	0
Municipalities
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	363,045
Total concentration of risk	388,045
Municipalities | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	15,520
Municipalities | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	347,525
Municipalities | Within 1 year
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	16,273
Total concentration of risk	41,273
Municipalities | Within 1 year | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	3,055
Municipalities | Within 1 year | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	13,218
Municipalities | After 1 to 5 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	153,139
Total concentration of risk	153,139
Municipalities | After 1 to 5 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	11,620
Municipalities | After 1 to 5 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	141,519
Municipalities | After 5 to 10 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	146,810
Total concentration of risk	146,810
Municipalities | After 5 to 10 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	845
Municipalities | After 5 to 10 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	145,965
Municipalities | After 10 years
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	46,823
Total concentration of risk	46,823
Municipalities | After 10 years | Investment Portfolio
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	0
Municipalities | After 10 years | Loans
Direct Exposure To The Puerto Rico Government By Maturity [Line Items]
Outstanding concentration of risk	$ 46,823