XML 12 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Nov. 04, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Document Transition Report false  
Entity File Number 001-14793  
Entity Registrant Name FIRST BANCORP  
Entity Incorporation State Country Code PR  
Entity Tax Identification Number 66-0561882  
Entity Address Address Line 1 1519 Ponce de León Avenue  
Entity Address Address Line 2 Stop 23  
Entity Address City Or Town San Juan  
Entity Address Country PR  
Entity Address Postal Zip Code 00908  
City Area Code 787  
Local Phone Number 729-8200  
Security 12b Title Common Stock ($0.10 par value per share)  
Trading Symbol FBP  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock Shares Outstanding   157,936,923
Entity Central Index Key 0001057706  
Amendment Flag false