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v3.26.1

Securities - Amortized cost and fair value by contractual maturity (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Amortized Cost |  |  |
Due after one year through five years | $ 180,963 |  |
Due after five years through ten years | 341,754 |  |
Due after ten years | 1,484,532 |  |
Amortized Cost | 2,007,249 |  | $ 2,048,030
Fair Value |  |  |
Due after one year through five years | 168,977 |  |
Due after five years through ten years | 297,376 |  |
Due after ten years | 1,217,785 |  |
Fair Value | 1,684,138 |  | 1,732,850
Amortized Cost |  |  |
Due in one year or less | 19,129 |  |
Due after one year through five years | 403,443 |  |
Due after five years through ten years | 1,149,497 |  |
Due after ten years | 5,397,114 |  |
Amortized Cost | 6,969,183 |  | 6,696,576
Fair Value |  |  |
Due in one year or less | 19,092 |  |
Due after one year through five years | 399,986 |  |
Due after five years through ten years | 1,083,644 |  |
Due after ten years | 5,027,626 |  |
Fair Value | 6,530,348 |  | $ 6,313,756
Information with respect to sales of available-for-sale securities |  |  |
Sale proceeds |  | $ 2,874,110 |
Gross realized gains |  | 8,892 |
Gross realized losses |  | 237,703 |
Net realized (losses) gain |  | (228,811) |
Sold securities | 0 | 1,800,000 |
Realized gains or losses |  | 0 |
Information with respect to sales of held-to-maturity |  |  |
Proceeds from sales of investment securities held to maturity | $ 0 | 0 |
Gross unrealized losses | 1,135 |  |
Sales of Securities Acquired from Independent |  |  |
Information with respect to sales of available-for-sale securities |  |  |
Sale proceeds |  | 1,279,717 |
Investment Securities Sales |  |  |
Information with respect to sales of available-for-sale securities |  |  |
Sale proceeds |  | 1,594,393 |
Gross realized gains |  | 8,892 |
Gross realized losses |  | 237,703 |
Net realized (losses) gain |  | $ (228,811) |

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3A + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
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- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3 + Details
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