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Regulatory capital requirements - Minimum amounts and ratios to be categorized as well-capitalized (Details) - Basel III
$ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
BPPR    
Regulatory Capital Requirements under Banking Regulations    
Capital Required to be Well Capitalized $ 2,650,453 $ 2,476,068
Capital Required to be Well Capitalized to Risk Weighted Assets 0.10 0.10
Common Equity Tier 1 Based Capital Amount To Be Well Capitalized $ 1,722,795 $ 1,609,444
Common Equity Tier 1 Based Capital Ratio To Be Well Capitalized 0.065 0.065
Tier One Risk Based Capital Required to be Well Capitalized $ 2,120,363 $ 1,980,855
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 0.08 0.08
Tier One Leverage Capital Required to be Well Capitalized $ 2,928,968 $ 2,979,348
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 0.05 0.05
PB    
Regulatory Capital Requirements under Banking Regulations    
Capital Required to be Well Capitalized $ 1,036,909 $ 938,581
Capital Required to be Well Capitalized to Risk Weighted Assets 0.10 0.10
Common Equity Tier 1 Based Capital Amount To Be Well Capitalized $ 673,991 $ 610,078
Common Equity Tier 1 Based Capital Ratio To Be Well Capitalized 0.065 0.065
Tier One Risk Based Capital Required to be Well Capitalized $ 829,527 $ 750,865
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 0.08 0.08
Tier One Leverage Capital Required to be Well Capitalized $ 634,927 $ 533,540
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 0.05 0.05