v3.26.1
REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES - Regulatory Capital Positions (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
First BanCorp [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Total Capital (to Risk-Weighted Assets) Actual $ 2,420,129 $ 2,412,137
Total Capital (to Risk-Weighted Assets) Actual Ratio 0.1819 0.1801
Total Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 1,064,412 $ 1,071,257
Total Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.080 0.080
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Actual $ 2,253,076 $ 2,243,981
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Actual Ratio 0.1693 0.1676
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 598,732 $ 602,582
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.045 0.045
Tier 1 Capital (to Risk-Weighted Assets) Actual $ 2,253,076 $ 2,243,981
Tier 1 Capital (to Risk-Weighted Assets) Actual Ratio 0.1693 0.1676
Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 798,309 $ 803,443
Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.060 0.060
Leverage Ratio Actual Amount $ 2,253,076 $ 2,243,981
Leverage Ratio Actual Ratio 0.1166 0.1158
Leverage Ratio Required For Capital Adequacy $ 773,001 $ 774,882
Leverage Ratio Required For Capital Adequacy Ratio 0.040 0.040
FirstBank [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Total Capital (to Risk-Weighted Assets) Actual $ 2,362,757 $ 2,355,882
Total Capital (to Risk-Weighted Assets) Actual Ratio 0.1777 0.1761
Total Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 1,063,962 $ 1,070,432
Total Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.080 0.080
Total Capital (to Risk-Weighted Assets) Required To Be Well Capitalized $ 1,329,953 $ 1,338,040
Total Capital (to Risk-Weighted Assets) Required To Be Well Capitalized Ratio 0.100 0.100
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Actual $ 2,095,773 $ 2,087,853
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Actual Ratio 0.1576 0.1560
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 598,479 $ 602,118
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.045 0.045
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required To Be Well Capitalized $ 864,469 $ 869,726
Common Equity Tier 1 Capital (to Risk-Weighted Assets) Required To Be Well Capitalized Ratio 0.065 0.065
Tier 1 Capital (to Risk-Weighted Assets) Actual $ 2,195,773 $ 2,187,853
Tier 1 Capital (to Risk-Weighted Assets) Actual Ratio 0.1651 0.1635
Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy $ 797,972 $ 802,824
Tier 1 Capital (to Risk-Weighted Assets) Required For Capital Adequacy Ratio 0.060 0.060
Tier 1 Capital (to Risk-Weighted Assets) Required To Be Well Capitalized $ 1,063,962 $ 1,070,432
Tier 1 Capital (to Risk-Weighted Assets) Required To Be Well Capitalized Ratio 0.080 0.080
Leverage Ratio Actual Amount $ 2,195,773 $ 2,187,853
Leverage Ratio Actual Ratio 0.1137 0.1130
Leverage Ratio Required For Capital Adequacy $ 772,626 $ 774,609
Leverage Ratio Required For Capital Adequacy Ratio 0.040 0.040
Leverage Ratio Required To Be Well Capitalized $ 965,783 $ 968,261
Leverage Ratio Required To Be Well Capitalized Ratio 0.050 0.050