Debt securities held-to-maturity - Schedule of Debt Securities, Held-to-Maturity (Details) - USD ($)
|
Jun. 30, 2026 |
Dec. 31, 2025 |
| Amortized cost |
|
|
| Amortized cost, Total |
$ 6,405,803,000
|
$ 7,620,074,000
|
| Book Value |
|
|
| Debt securities held-to-maturity (fair value 2026 - $6,176,976; 2025 - $7,363,587) |
6,204,020,000
|
7,327,529,000
|
| Allowance for Credit Losses |
|
|
| Allowance for credit losses, Total |
6,230,000
|
5,812,000
|
| Carrying Value Net of Allowance |
|
|
| Debt securities held-to-maturity, net |
6,197,790,000
|
7,321,717,000
|
| Gross unrealized gains |
|
|
| Gross unrealized gains, Total |
2,490,000
|
44,085,000
|
| Gross unrealized losses |
|
|
| Gross unrealized losses, Total |
23,304,000
|
2,215,000
|
| Fair value |
|
|
| Fair value, Total |
$ 6,176,976,000
|
$ 7,363,587,000
|
| Weighted average yield |
|
|
| Weighted average yield, Total |
1.23%
|
1.29%
|
| Debt securities net unrealized loss remaining in AOCI included in book value for AFS securities transferred to HTM securities |
$ 201,800,000
|
$ 293,000,000.0
|
| Debt securities pledged to secure government and trust deposits |
6,405,803,000
|
7,620,074,000
|
| Asset Pledged as Collateral |
|
|
| Amortized cost |
|
|
| Amortized cost, Total |
6,100,000,000
|
7,300,000,000
|
| Weighted average yield |
|
|
| Debt securities pledged to secure government and trust deposits |
6,100,000,000
|
7,300,000,000
|
| Asset Not Pledged as Collateral |
|
|
| Amortized cost |
|
|
| Amortized cost, Total |
99,700,000
|
98,800,000
|
| Weighted average yield |
|
|
| Debt securities pledged to secure government and trust deposits |
99,700,000
|
98,800,000
|
| U.S. Treasury securities |
|
|
| Amortized cost |
|
|
| Amortized cost - Within 1 year |
2,550,122,000
|
2,558,293,000
|
| Amortized cost - After 1 to 5 years |
3,806,389,000
|
5,003,219,000
|
| Amortized cost, Total |
6,356,511,000
|
7,561,512,000
|
| Book Value |
|
|
| Book Value - within 1 year |
2,514,507,000
|
2,519,071,000
|
| Book Value - After 1 to 5 years |
3,640,221,000
|
4,749,896,000
|
| Debt securities held-to-maturity (fair value 2026 - $6,176,976; 2025 - $7,363,587) |
6,154,728,000
|
7,268,967,000
|
| Allowance for Credit Losses |
|
|
| Allowance for credit losses - Within 1 Year |
0
|
0
|
| Allowance for credit losses - After 1 to 5 years |
0
|
0
|
| Allowance for credit losses, Total |
0
|
0
|
| Carrying Value Net of Allowance |
|
|
| Carrying Value Net of Allowance - Within 1 Year |
2,514,507,000
|
2,519,071,000
|
| Carrying Value Net of Allowance - After 1 to 5 Years |
3,640,221,000
|
4,749,896,000
|
| Debt securities held-to-maturity, net |
6,154,728,000
|
7,268,967,000
|
| Gross unrealized gains |
|
|
| Gross unrealized gains - Within 1 year |
0
|
5,224,000
|
| Gross unrealized gains - After 1 to 5 years |
0
|
35,910,000
|
| Gross unrealized gains, Total |
0
|
41,134,000
|
| Gross unrealized losses |
|
|
| Gross unrealized losses - Within 1 year |
2,273,000
|
110,000
|
| Gross unrealized losses - After 1 to 5 years |
19,074,000
|
0
|
| Gross unrealized losses, Total |
21,347,000
|
110,000
|
| Fair value |
|
|
| Fair value - within 1 year |
2,512,234,000
|
2,524,185,000
|
| Fair value - After 1 to 5 years |
3,621,147,000
|
4,785,806,000
|
| Fair value, Total |
$ 6,133,381,000
|
$ 7,309,991,000
|
| Weighted average yield |
|
|
| Weighted average yield - Within 1 Year |
1.06%
|
1.31%
|
| Weighted average yield - After 1 to 5 years |
1.33%
|
1.27%
|
| Weighted average yield, Total |
1.22%
|
1.28%
|
| Debt securities pledged to secure government and trust deposits |
$ 6,356,511,000
|
$ 7,561,512,000
|
| Obligations of Puerto Rico, States and political subdivisions |
|
|
| Amortized cost |
|
|
| Amortized cost - Within 1 year |
2,720,000
|
2,605,000
|
| Amortized cost - After 1 to 5 years |
3,910,000
|
12,508,000
|
| Amortized cost - After 5 to 10 years |
450,000
|
450,000
|
| Amortized cost - After 10 years |
34,769,000
|
35,544,000
|
| Amortized cost, Total |
41,849,000
|
51,107,000
|
| Book Value |
|
|
| Book Value - within 1 year |
2,720,000
|
2,605,000
|
| Book Value - After 1 to 5 years |
3,910,000
|
12,508,000
|
| Book Value - After 5 to 10 years |
450,000
|
450,000
|
| Book Value - After 10 years |
34,769,000
|
35,544,000
|
| Debt securities held-to-maturity (fair value 2026 - $6,176,976; 2025 - $7,363,587) |
41,849,000
|
51,107,000
|
| Allowance for Credit Losses |
|
|
| Allowance for credit losses - Within 1 Year |
8,000
|
5,000
|
| Allowance for credit losses - After 1 to 5 years |
24,000
|
39,000
|
| Allowance for credit losses - After 5 to 10 years |
14,000
|
15,000
|
| Allowance for credit losses - After 10 years |
6,184,000
|
5,753,000
|
| Allowance for credit losses, Total |
6,230,000
|
5,812,000
|
| Carrying Value Net of Allowance |
|
|
| Carrying Value Net of Allowance - Within 1 Year |
2,712,000
|
2,600,000
|
| Carrying Value Net of Allowance - After 1 to 5 Years |
3,886,000
|
12,469,000
|
| Carrying Value Net of Allowance - After 5 to 10 Years |
436,000
|
435,000
|
| Carrying Value Net of Allowance - After 10 Years |
28,585,000
|
29,791,000
|
| Debt securities held-to-maturity, net |
35,619,000
|
45,295,000
|
| Gross unrealized gains |
|
|
| Gross unrealized gains - Within 1 year |
8,000
|
4,000
|
| Gross unrealized gains - After 1 to 5 years |
11,000
|
24,000
|
| Gross unrealized gains - After 5 to 10 years |
6,000
|
15,000
|
| Gross unrealized gains - After 10 years |
2,465,000
|
2,908,000
|
| Gross unrealized gains, Total |
2,490,000
|
2,951,000
|
| Gross unrealized losses |
|
|
| Gross unrealized losses - Within 1 year |
0
|
0
|
| Gross unrealized losses - After 1 to 5 years |
0
|
87,000
|
| Gross unrealized losses - After 5 to 10 years |
0
|
0
|
| Gross unrealized losses - After 10 years |
1,770,000
|
1,829,000
|
| Gross unrealized losses, Total |
1,770,000
|
1,916,000
|
| Fair value |
|
|
| Fair value - within 1 year |
2,720,000
|
2,604,000
|
| Fair value - After 1 to 5 years |
3,897,000
|
12,406,000
|
| Fair value - After 5 to 10 years |
442,000
|
450,000
|
| Fair value - After 10 years |
29,280,000
|
30,870,000
|
| Fair value, Total |
$ 36,339,000
|
$ 46,330,000
|
| Weighted average yield |
|
|
| Weighted average yield - Within 1 Year |
6.45%
|
6.43%
|
| Weighted average yield - After 1 to 5 years |
1.84%
|
3.49%
|
| Weighted average yield - After 5 to 10 years |
5.81%
|
5.81%
|
| Weighted average yield - After 10 years |
1.43%
|
1.43%
|
| Weighted average yield, Total |
1.84%
|
2.22%
|
| Debt securities pledged to secure government and trust deposits |
$ 41,849,000
|
$ 51,107,000
|
| Collateralized mortgage obligations - federal agencies |
|
|
| Amortized cost |
|
|
| Amortized cost - After 10 years |
1,483,000
|
1,495,000
|
| Amortized cost, Total |
1,483,000
|
1,495,000
|
| Book Value |
|
|
| Book Value - After 10 years |
1,483,000
|
1,495,000
|
| Debt securities held-to-maturity (fair value 2026 - $6,176,976; 2025 - $7,363,587) |
1,483,000
|
1,495,000
|
| Allowance for Credit Losses |
|
|
| Allowance for credit losses - After 10 years |
0
|
0
|
| Allowance for credit losses, Total |
0
|
0
|
| Carrying Value Net of Allowance |
|
|
| Carrying Value Net of Allowance - After 10 Years |
1,483,000
|
1,495,000
|
| Debt securities held-to-maturity, net |
1,483,000
|
1,495,000
|
| Gross unrealized gains |
|
|
| Gross unrealized gains - After 10 years |
0
|
0
|
| Gross unrealized gains, Total |
0
|
0
|
| Gross unrealized losses |
|
|
| Gross unrealized losses - After 10 years |
187,000
|
189,000
|
| Gross unrealized losses, Total |
187,000
|
189,000
|
| Fair value |
|
|
| Fair value - After 10 years |
1,296,000
|
1,306,000
|
| Fair value, Total |
$ 1,296,000
|
$ 1,306,000
|
| Weighted average yield |
|
|
| Weighted average yield - After 10 years |
2.87%
|
2.87%
|
| Weighted average yield, Total |
2.87%
|
2.87%
|
| Debt securities pledged to secure government and trust deposits |
$ 1,483,000
|
$ 1,495,000
|
| Securities in wholly owned statutory business trusts |
|
|
| Amortized cost |
|
|
| Amortized cost - After 5 to 10 years |
5,960,000
|
5,960,000
|
| Amortized cost, Total |
5,960,000
|
5,960,000
|
| Book Value |
|
|
| Book Value - After 5 to 10 years |
5,960,000
|
5,960,000
|
| Debt securities held-to-maturity (fair value 2026 - $6,176,976; 2025 - $7,363,587) |
5,960,000
|
5,960,000
|
| Allowance for Credit Losses |
|
|
| Allowance for credit losses - After 5 to 10 years |
0
|
0
|
| Allowance for credit losses, Total |
0
|
0
|
| Carrying Value Net of Allowance |
|
|
| Carrying Value Net of Allowance - After 5 to 10 Years |
5,960,000
|
5,960,000
|
| Debt securities held-to-maturity, net |
5,960,000
|
5,960,000
|
| Gross unrealized gains |
|
|
| Gross unrealized gains - After 5 to 10 years |
0
|
0
|
| Gross unrealized gains, Total |
0
|
0
|
| Gross unrealized losses |
|
|
| Gross unrealized losses - After 5 to 10 years |
0
|
0
|
| Gross unrealized losses, Total |
0
|
0
|
| Fair value |
|
|
| Fair value - After 5 to 10 years |
5,960,000
|
5,960,000
|
| Fair value, Total |
$ 5,960,000
|
$ 5,960,000
|
| Weighted average yield |
|
|
| Weighted average yield - After 5 to 10 years |
6.33%
|
6.33%
|
| Weighted average yield, Total |
6.33%
|
6.33%
|
| Debt securities pledged to secure government and trust deposits |
$ 5,960,000
|
$ 5,960,000
|