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, 2021	Dec. 31, 2020
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	$ 374,573
Total concentration of risk	374,573
Investment Portfolio
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	32,648	$ 35,000
Loans
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	341,925	$ 342,000
From PR Central Government
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	58
Total concentration of risk	58
From PR Central Government | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	3
Total concentration of risk	3
From PR Central Government | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	17
Total concentration of risk	17
From PR Central Government | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	38
Total concentration of risk	38
From PR Central Government | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	58
From PR Central Government | Investment Portfolio | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	3
From PR Central Government | Investment Portfolio | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	17
From PR Central Government | Investment Portfolio | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	38
From PR Central Government | Loans
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
From PR Central Government | Loans | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
From PR Central Government | Loans | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
From PR Central Government | Loans | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	0
From Municipalities
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	374,515
Total concentration of risk	374,515
From Municipalities | Within 1 year
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	21,312
Total concentration of risk	21,312
From Municipalities | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	148,130
Total concentration of risk	148,130
From Municipalities | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	134,145
Total concentration of risk	134,145
From Municipalities | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	70,928
Total concentration of risk	70,928
From Municipalities | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	32,590
From Municipalities | Investment Portfolio | Within 1 year
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	4,165
From Municipalities | Investment Portfolio | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	14,765
From Municipalities | Investment Portfolio | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	13,210
From Municipalities | Investment Portfolio | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	450
From Municipalities | Loans
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	341,925
From Municipalities | Loans | Within 1 year
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	17,147
From Municipalities | Loans | After 1 and within 5 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	133,365
From Municipalities | Loans | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	120,935
From Municipalities | Loans | After 10 years
Direct exposure to the puerto rico government by maturity
Outstanding concentration of risk	$ 70,478