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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2026
Fair Value Disclosures [Abstract] |
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis | The following tables present for each of the fair value hierarchy levels the Company’s financial assets and liabilities that are measured at fair value on a recurring basis on the consolidated balance sheets at March 31, 2026 and December 31, 2025:
|  | March 31, 2026 |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Available for sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and government agency securities |  | $ | — |  |  | $ | 282,467 |  |  | $ | — |  |  | $ | 282,467 |
Municipal obligations |  |  | — |  |  |  | 180,143 |  |  |  | — |  |  |  | 180,143 |
Corporate debt securities |  |  | — |  |  |  | 16,237 |  |  |  | — |  |  |  | 16,237 |
Residential mortgage-backed securities |  |  | — |  |  |  | 2,333,405 |  |  |  | — |  |  |  | 2,333,405 |
Commercial mortgage-backed securities |  |  | — |  |  |  | 3,140,320 |  |  |  | — |  |  |  | 3,140,320 |
Collateralized mortgage obligations |  |  | — |  |  |  | 23,814 |  |  |  | — |  |  |  | 23,814 |
Total available for sale securities |  |  | — |  |  |  | 5,976,386 |  |  |  | — |  |  |  | 5,976,386 |
Mortgage loans held for sale |  |  | — |  |  |  | 36,477 |  |  |  | — |  |  |  | 36,477 |
Derivative assets (1) |  |  | — |  |  |  | 55,683 |  |  |  | — |  |  |  | 55,683 |
Total recurring fair value measurements - assets |  | $ | — |  |  | $ | 6,068,546 |  |  | $ | — |  |  | $ | 6,068,546 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities (1) |  | $ | — |  |  | $ | 90,061 |  |  | $ | 1,082 |  |  | $ | 91,143 |
Total recurring fair value measurements - liabilities |  | $ | — |  |  | $ | 90,061 |  |  | $ | 1,082 |  |  | $ | 91,143 |
(1) For further disaggregation of derivative assets and liabilities, see Note 6 - Derivatives.
|  | December 31, 2025 |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Available for sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and government agency securities |  | $ | — |  |  | $ | 269,332 |  |  | $ | — |  |  | $ | 269,332 |
Municipal obligations |  |  | — |  |  |  | 191,328 |  |  |  | — |  |  |  | 191,328 |
Corporate debt securities |  |  | — |  |  |  | 16,357 |  |  |  | — |  |  |  | 16,357 |
Residential mortgage-backed securities |  |  | — |  |  |  | 2,375,629 |  |  |  | — |  |  |  | 2,375,629 |
Commercial mortgage-backed securities |  |  | — |  |  |  | 3,083,325 |  |  |  | — |  |  |  | 3,083,325 |
Collateralized mortgage obligations |  |  | — |  |  |  | 25,946 |  |  |  | — |  |  |  | 25,946 |
Total available for sale securities |  |  | — |  |  |  | 5,961,917 |  |  |  | — |  |  |  | 5,961,917 |
Mortgage loans held for sale |  |  | — |  |  |  | 33,158 |  |  |  | — |  |  |  | 33,158 |
Derivative assets (1) |  |  | — |  |  |  | 63,126 |  |  |  | — |  |  |  | 63,126 |
Total recurring fair value measurements - assets |  | $ | — |  |  | $ | 6,058,201 |  |  | $ | — |  |  | $ | 6,058,201 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities (1) |  | $ | — |  |  | $ | 94,083 |  |  | $ | 1,284 |  |  | $ | 95,367 |
Total recurring fair value measurements - liabilities |  | $ | — |  |  | $ | 94,083 |  |  | $ | 1,284 |  |  | $ | 95,367 |
(1) For further disaggregation of derivative assets and liabilities, see Note 6 - Derivatives.
Financial Assets Measured at Fair Value on Nonrecurring Basis | The following tables present the Company’s financial assets that are measured at fair value on a nonrecurring basis for each of the fair value hierarchy levels.
|  | March 31, 2026 |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Collateral-dependent individually evaluated loans |  | $ | — |  |  | $ | — |  |  | $ | 26,109 |  |  | $ | 26,109 |
Other real estate owned and foreclosed assets |  |  | — |  |  |  | — |  |  |  | 11,257 |  |  |  | 11,257 |
Total nonrecurring fair value measurements |  | $ | — |  |  | $ | — |  |  | $ | 37,366 |  |  | $ | 37,366 |
|  | December 31, 2025 |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Collateral-dependent individually evaluated loans |  | $ | — |  |  | $ | — |  |  | $ | 33,762 |  |  | $ | 33,762 |
Other real estate owned and foreclosed assets, net |  |  | — |  |  |  | — |  |  |  | 14,788 |  |  |  | 14,788 |
Total nonrecurring fair value measurements |  | $ | — |  |  | $ | — |  |  | $ | 48,550 |  |  | $ | 48,550 |
Estimated Fair Values of Financial Instruments | The following tables present the estimated fair values of the Company’s financial instruments by fair value hierarchy levels and the corresponding carrying amounts.
| March 31, 2026 |
|  |  |  |  |  |  | Total Fair |  | Carrying |
($ in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Value |  | Amount |
Financial assets: |  |  |  |  |  |  |  |  |  |
Cash, interest-bearing bank deposits, and federal funds sold | $ | 779,018 |  | $ | 212 |  | $ | — |  | $ | 779,230 |  | $ | 779,230 |
Available for sale securities |  | — |  |  | 5,976,386 |  |  | — |  |  | 5,976,386 |  |  | 5,976,386 |
Held to maturity securities |  | — |  |  | 1,926,729 |  |  | — |  |  | 1,926,729 |  |  | 2,051,628 |
Loans, net |  | — |  |  | — |  |  | 23,577,647 |  |  | 23,577,647 |  |  | 23,680,524 |
Loans held for sale |  | — |  |  | 63,090 |  |  | — |  |  | 63,090 |  |  | 63,090 |
Derivative financial instruments |  | — |  |  | 55,683 |  |  | — |  |  | 55,683 |  |  | 55,683 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |
Deposits | $ | — |  | $ | — |  | $ | 29,072,945 |  | $ | 29,072,945 |  | $ | 29,082,134 |
Federal funds purchased |  | — |  |  | 325 |  |  | — |  |  | 325 |  |  | 325 |
Securities sold under agreements to repurchase |  | — |  |  | 660,126 |  |  | — |  |  | 660,126 |  |  | 660,126 |
Short-term FHLB Borrowings |  | — |  |  | 700,215 |  |  | — |  |  | 700,215 |  |  | 700,000 |
Long-term debt |  | — |  |  | 155,330 |  |  | — |  |  | 155,330 |  |  | 193,785 |
Derivative financial instruments |  | — |  |  | 90,061 |  |  | 1,082 |  |  | 91,143 |  |  | 91,143 |
| December 31, 2025 |
($ in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total Fair Value |  | Carrying Amount |
Financial assets: |  |  |  |  |  |  |  |  |  |
Cash, interest-bearing bank deposits, and federal funds sold | $ | 695,032 |  | $ | 229 |  | $ | — |  | $ | 695,261 |  | $ | 695,261 |
Available for sale securities |  | — |  |  | 5,961,917 |  |  | — |  |  | 5,961,917 |  |  | 5,961,917 |
Held to maturity securities |  | — |  |  | 2,011,026 |  |  | — |  |  | 2,011,026 |  |  | 2,132,882 |
Loans, net |  | — |  |  | — |  |  | 23,588,681 |  |  | 23,588,681 |  |  | 23,650,709 |
Loans held for sale |  | — |  |  | 33,158 |  |  | — |  |  | 33,158 |  |  | 33,158 |
Derivative financial instruments |  | — |  |  | 63,126 |  |  | — |  |  | 63,126 |  |  | 63,126 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |
Deposits | $ | — |  | $ | — |  | $ | 29,274,190 |  | $ | 29,274,190 |  | $ | 29,279,774 |
Federal funds purchased |  | — |  |  | 70,400 |  |  | — |  |  | 70,400 |  |  | 70,400 |
Securities sold under agreements to repurchase |  | — |  |  | 546,892 |  |  | — |  |  | 546,892 |  |  | 546,892 |
Short-term FHLB Borrowings |  | — |  |  | 400,000 |  |  | — |  |  | 400,000 |  |  | 400,000 |
Long-term debt |  | — |  |  | 162,257 |  |  | — |  |  | 162,257 |  |  | 199,407 |
Derivative financial instruments |  | — |  |  | 94,083 |  |  | 1,284 |  |  | 95,367 |  |  | 95,367 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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