Fair value of financial instruments (Tables)	9 Months Ended
Fair value of financial instruments (Tables)	Sep. 30, 2025
Fair Value Disclosures
Carrying amount and estimated fair value of financial instruments with corresponding level in the fair value hierarchy	September 30, 2025 Carrying Measured (In thousands) amount Level 1 Level 2 Level 3 at NAV Fair value Financial Assets: Cash and due from banks $ 377,079 $ 377,079 $ - $ - $ - $ 377,079 Money market investments 4,754,391 4,744,211 10,180 - - 4,754,391 Trading account debt securities, excluding derivatives [1] 33,106 8,026 24,878 202 - 33,106 Debt securities available-for-sale [1] 20,686,423 6,423,246 14,261,996 1,181 - 20,686,423 Debt securities held-to-maturity: U.S. Treasury securities $ 7,374,072 $ - $ 7,405,080 $ - $ - $ 7,405,080 Obligations of Puerto Rico, States and political subdivisions 45,760 - 6,799 40,334 - 47,133 Collateralized mortgage obligation-federal agency 1,506 - 1,315 - - 1,315 Securities in wholly owned statutory business trusts 5,960 - 5,960 - - 5,960 Total debt securities held-to-maturity $ 7,427,298 $ - $ 7,419,154 $ 40,334 $ - $ 7,459,488 Equity securities: FHLB stock $ 58,552 $ - $ 58,552 $ - $ - $ 58,552 FRB stock 102,038 - 102,038 - - 102,038 Other investments 58,403 - 50,047 8,137 825 59,009 Total equity securities $ 218,993 $ - $ 210,637 $ 8,137 $ 825 $ 219,599 Loans held-for-sale $ 7,783 $ - $ 7,783 $ - $ - $ 7,783 Loans held-in-portfolio 37,900,938 - - 37,105,428 - 37,105,428 Mortgage servicing rights 99,523 - - 99,523 - 99,523 Derivatives 27,716 - 27,716 - - 27,716 September 30, 2025 Carrying Measured (In thousands) amount Level 1 Level 2 Level 3 at NAV Fair value Financial Liabilities: Deposits: Demand deposits $ 56,892,010 $ - $ 56,892,010 $ - $ - $ 56,892,010 Time deposits 9,621,394 - 9,419,413 - - 9,419,413 Total deposits $ 66,513,404 $ - $ 66,311,423 $ - $ - $ 66,311,423 Assets sold under agreements to repurchase $ 56,853 $ - $ 56,859 $ - $ - $ 56,859 Other short-term borrowings [2] 400,000 - 400,000 - - 400,000 Notes payable: FHLB advances $ 195,312 $ - $ 193,131 $ - $ - $ 193,131 Unsecured senior debt securities 396,249 - 420,152 - - 420,152 Junior subordinated deferrable interest debentures (related to trust preferred securities) 198,393 - 188,081 - - 188,081 Total notes payable $ 789,954 $ - $ 801,364 $ - $ - $ 801,364 Derivatives $ 26,157 $ - $ 26,157 $ - $ - $ 26,157 [1] Refer to Note 21 to the Consolidated Financial Statements for the fair value by class of financial asset and its hierarchy level. [2] Refer to Note 13 to the Consolidated Financial Statements for the composition of other short-term borrowings. December 31, 2024 Carrying Measured (In thousands) amount Level 1 Level 2 Level 3 at NAV Fair value Financial Assets: Cash and due from banks $ 419,638 $ 419,638 $ - $ - $ - $ 419,638 Money market investments 6,380,948 6,371,180 9,768 - - 6,380,948 Trading account debt securities, excluding derivatives [1] 32,783 2,814 29,752 217 - 32,783 Debt securities available-for-sale [1] 18,245,903 7,512,171 10,730,998 2,734 - 18,245,903 Debt securities held-to-maturity: U.S. Treasury securities $ 7,693,418 $ - $ 7,623,824 $ - $ - $ 7,623,824 Obligations of Puerto Rico, States and political subdivisions 51,865 - 6,866 44,711 - 51,577 Collateralized mortgage obligation-federal agency 1,518 - 1,304 - - 1,304 Securities in wholly owned statutory business trusts 5,959 - 5,959 - - 5,959 Total debt securities held-to-maturity $ 7,752,760 $ - $ 7,637,953 $ 44,711 $ - $ 7,682,664 Equity securities: FHLB stock $ 55,786 $ - $ 55,786 $ - $ - $ 55,786 FRB stock 100,304 - 100,304 - - 100,304 Other investments 52,076 - 45,664 6,528 381 52,573 Total equity securities $ 208,166 $ - $ 201,754 $ 6,528 $ 381 $ 208,663 Loans held-for-sale $ 5,423 $ - $ 5,423 $ - $ - $ 5,423 Loans held-in-portfolio 36,361,628 - - 35,652,539 - 35,652,539 Mortgage servicing rights 108,103 - - 108,103 - 108,103 Derivatives 26,023 - 26,023 - - 26,023 December 31, 2024 Carrying Measured (In thousands) amount Level 1 Level 2 Level 3 at NAV Fair value Financial Liabilities: Deposits: Demand deposits $ 55,871,463 $ - $ 55,871,463 $ - $ - $ 55,871,463 Time deposits 9,012,882 - 8,795,803 - - 8,795,803 Total deposits $ 64,884,345 $ - $ 64,667,266 $ - $ - $ 64,667,266 Assets sold under agreements to repurchase $ 54,833 $ - $ 54,845 $ - $ - $ 54,845 Other short-term borrowings [2] 225,000 - 225,000 - - 225,000 Notes payable: FHLB advances $ 302,722 $ - $ 295,023 $ - $ - $ 295,023 Unsecured senior debt securities 395,198 - 415,148 - - 415,148 Junior subordinated deferrable interest debentures (related to trust preferred securities) 198,373 - 189,758 - - 189,758 Total notes payable $ 896,293 $ - $ 899,929 $ - $ - $ 899,929 Derivatives $ 22,832 $ - $ 22,832 $ - $ - $ 22,832 [1] Refer to Note 21 to the Consolidated Financial Statements for the fair value by class of financial asset and its hierarchy level. [2] Refer to Note 13 to the Consolidated Financial Statements for the composition of other short-term borrowings.