Commitments and Contingencies - Schedule of Direct Exposure to Puerto Rico Government by Maturity (Details) - PR Government direct exposure - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	$ 428,576
Total concentration of risk	428,576
From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	58
Total concentration of risk	58
From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	428,518
Total concentration of risk	428,518
Loans
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	390,893	$ 391,000
Loans | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
Loans | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	390,893
Securities Investment
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	37,683	$ 41,000
Securities Investment | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	58
Securities Investment | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	37,625
Within 1 year | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	82,027
Total concentration of risk	82,027
Within 1 year | Loans | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	78,107
Within 1 year | Securities Investment | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	3,920
After 1 and within 5 years | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	7
Total concentration of risk	7
After 1 and within 5 years | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	155,608
Total concentration of risk	155,608
After 1 and within 5 years | Loans | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
After 1 and within 5 years | Loans | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	139,218
After 1 and within 5 years | Securities Investment | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	7
After 1 and within 5 years | Securities Investment | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	16,390
After 5 to 10 years | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	18
Total concentration of risk	18
After 5 to 10 years | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	99,627
Total concentration of risk	99,627
After 5 to 10 years | Loans | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
After 5 to 10 years | Loans | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	82,967
After 5 to 10 years | Securities Investment | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	18
After 5 to 10 years | Securities Investment | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	16,660
After 10 years | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	33
Total concentration of risk	33
After 10 years | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	91,256
Total concentration of risk	91,256
After 10 years | Loans | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
After 10 years | Loans | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	90,601
After 10 years | Securities Investment | From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	33
After 10 years | Securities Investment | From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	$ 655