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REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES (Tables) | 9 Months Ended
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Sep. 30, 2025
REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES [Abstract] |
Regulatory Capital Positions [Table Text Block] | Regulatory Requirements Actual For Capital Adequacy Purposes To be Well -Capitalized Thresholds Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of September 30, 2025 Total Capital (to Risk-Weighted Assets) First BanCorp. $ 2,399,420 17.93 % $ 1,070,714 8.0 % N/A N/A FirstBank $ 2,338,242 17.48 % $ 1,069,894 8.0 % $ 1,337,367 10.0 % CET1 Capital (to Risk-Weighted Assets) First BanCorp. $ 2,231,390 16.67 % $ 602,277 4.5 % N/A N/A FirstBank $ 2,070,339 15.48 % $ 601,815 4.5 % $ 869,289 6.5 % Tier I Capital (to Risk-Weighted Assets) First BanCorp. $ 2,231,390 16.67 % $ 803,035 6.0 % N/A N/A FirstBank $ 2,170,339 16.23 % $ 802,420 6.0 % $ 1,069,894 8.0 % Leverage ratio First BanCorp. $ 2,231,390 11.52 % $ 774,943 4.0 % N/A N/A FirstBank $ 2,170,339 11.20 % $ 775,251 4.0 % $ 969,064 5.0 % As of December 31, 2024 (1) Total Capital (to Risk-Weighted Assets) First BanCorp. $ 2,404,581 18.02 % $ 1,067,380 8.0 % N/A N/A FirstBank $ 2,369,441 17.76 % $ 1,067,033 8.0 % $ 1,333,791 10.0 % CET1 Capital (to Risk-Weighted Assets) First BanCorp. $ 2,177,748 16.32 % $ 600,401 4.5 % N/A N/A % FirstBank $ 2,102,512 15.76 % $ 600,206 4.5 % $ 866,964 6.5 % Tier I Capital (to Risk-Weighted Assets) First BanCorp. $ 2,177,748 16.32 % $ 800,535 6.0 % N/A N/A FirstBank $ 2,202,512 16.51 % $ 800,275 6.0 % $ 1,067,033 8.0 % Leverage ratio First BanCorp. $ 2,177,748 11.07 % $ 786,937 4.0 % N/A N/A FirstBank $ 2,202,512 11.20 % $ 786,712 4.0 % $ 983,390 5.0 % (1) As of December 31, 2024, capital ratios reflect the delay in the full effect of CECL. The Corporation elected the option provided by the interim final rule issued by the federal banking agencies on March 31, 2020, in response to the impact of COVID-19, to temporarily delay the effects of CECL on regulatory capital during a five-year transition period which ended on January 1, 2025.

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B + Details
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