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Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Fair Value of Assets and Liabilities Recorded on a Recurring Basis | The following tables summarize financial assets and financial liabilities recorded at fair value on a recurring basis at September 30, 2025, and December 31, 2024, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. There were no changes in the valuation techniques during the periods presented.
| September 30, 2025 |
(Dollars in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total |
State and municipal securities | $ | — |  |  | $ | 258,335 |  |  | $ | 34,249 |  |  | $ | 292,584 |  |
Corporate bonds | — |  |  | 60,835 |  |  | 1,000 |  |  | 61,835 |  |
U.S. government agency securities | — |  |  | 3,128 |  |  | — |  |  | 3,128 |  |
Commercial mortgage-backed securities | — |  |  | 15,248 |  |  | — |  |  | 15,248 |  |
Residential mortgage-backed securities | — |  |  | 449,068 |  |  | — |  |  | 449,068 |  |
Commercial collateralized mortgage obligations | — |  |  | 82,586 |  |  | — |  |  | 82,586 |  |
Residential collateralized mortgage obligations | — |  |  | 200,340 |  |  | — |  |  | 200,340 |  |
Securities available for sale | — |  |  | 1,069,540 |  |  | 35,249 |  |  | 1,104,789 |  |
Securities carried at fair value through income | — |  |  | — |  |  | 6,203 |  |  | 6,203 |  |
Rabbi Trust assets | 771 |  |  | — |  |  | — |  |  | 771 |  |
Other assets - derivatives | — |  |  | 14,868 |  |  | — |  |  | 14,868 |  |
Total recurring fair value measurements - assets | $ | 771 |  |  | $ | 1,084,408 |  |  | $ | 41,452 |  |  | $ | 1,126,631 |  |
Other liabilities - derivatives | — |  |  | (15,518) |  |  | — |  |  | (15,518) |  |
Total recurring fair value measurements - liabilities | $ | — |  |  | $ | (15,518) |  |  | $ | — |  |  | $ | (15,518) |  |
| December 31, 2024 |
(Dollars in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total |
State and municipal securities | $ | — |  |  | $ | 221,222 |  |  | $ | 34,754 |  |  | $ | 255,976 |  |
Corporate bonds | — |  |  | 77,236 |  |  | 1,000 |  |  | 78,236 |  |
U.S. government agency securities | — |  |  | 13,805 |  |  | — |  |  | 13,805 |  |
Commercial mortgage-backed securities | — |  |  | 44,284 |  |  | — |  |  | 44,284 |  |
Residential mortgage-backed securities | — |  |  | 540,834 |  |  | — |  |  | 540,834 |  |
Commercial collateralized mortgage obligations | — |  |  | 28,566 |  |  | — |  |  | 28,566 |  |
Residential collateralized mortgage obligations | — |  |  | 140,827 |  |  | — |  |  | 140,827 |  |
Securities available for sale | — |  |  | 1,066,774 |  |  | 35,754 |  |  | 1,102,528 |  |
Securities carried at fair value through income | — |  |  | — |  |  | 6,512 |  |  | 6,512 |  |
Loans held for sale | — |  |  | 10,494 |  |  | — |  |  | 10,494 |  |
Rabbi Trust assets | 509 |  |  | — |  |  | — |  |  | 509 |  |
Other assets - derivatives | — |  |  | 15,595 |  |  | — |  |  | 15,595 |  |
Total recurring fair value measurements - assets | $ | 509 |  |  | $ | 1,092,863 |  |  | $ | 42,266 |  |  | $ | 1,135,638 |  |
Other liabilities - derivatives | — |  |  | (14,959) |  |  | — |  |  | (14,959) |  |
Total recurring fair value measurements - liabilities | $ | — |  |  | $ | (14,959) |  |  | $ | — |  |  | $ | (14,959) |  |
Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis | The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the nine months ended September 30, 2025 and 2024, are summarized as follows:
(Dollars in thousands) | Securities Available for Sale |  | Securities at Fair Value Through Income |
Balance at January 1, 2025 | $ | 35,754 |  |  | $ | 6,512 |  |
Gain recognized in earnings: |  |  |  |
Other noninterest income | — |  |  | 6 |  |
Loss recognized in AOCI | 638 |  |  | — |  |
Purchases, issuances, sales and settlements: |  |  |  |
Purchases | 638 |  |  | — |  |
Settlements | (1,781) |  |  | (315) |  |
Balance at September 30, 2025 | $ | 35,249 |  |  | $ | 6,203 |  |
(Dollars in thousands) |  |  | MSR Asset |  | Securities Available for Sale |  | Securities at Fair Value Through Income
Balance at January 1, 2024 |  |  | $ | 15,637 |  |  | $ | 50,447 |  |  | $ | 6,808 |
Gain (loss) recognized in earnings: |  |  |  |  |  |  |
Mortgage banking revenue |  |  | 450 |  |  | — |  |  | — |
Other noninterest income |  |  | — |  |  | — |  |  | 24 |
Loss recognized in AOCI |  |  | — |  |  | 511 |  |  | — |
Purchases, issuances, sales and settlements: |  |  |  |  |  |  |
Sales |  |  | (16,087) |  |  | — |  |  | — |
Settlements |  |  | — |  |  | (7,803) |  |  | (299) |
Balance at September 30, 2024 |  |  | $ | — |  |  | $ | 43,155 |  |  | $ | 6,533 |
Schedule of Difference Between Fair Value and the Unpaid Principal Balance for Financial Instruments for which the Fair Value Option has been Elected and Classified in Income Statement | The following tables summarize the difference between the fair value and the unpaid principal balance, amortized cost or contributions, respectively, for financial instruments for which the fair value option has been elected:
| September 30, 2025 |
(Dollars in thousands) | Aggregate Fair Value |  | Principal Balance/Amortized Cost/Contributions |  | Difference |
Securities carried at fair value through income | $ | 6,203 |  |  | $ | 6,200 |  |  | $ | 3 |  |
Rabbi Trust assets | 771 |  |  | 724 |  |  | 47 |  |
Total | $ | 6,974 |  |  | $ | 6,924 |  |  | $ | 50 |  |
| December 31, 2024
(Dollars in thousands) | Aggregate Fair Value |  | Principal Balance/Amortized Cost/Contributions |  | Difference
Loans held for sale(1) | $ | 10,494 |  |  | $ | 10,228 |  |  | $ | 266 |
Securities carried at fair value through income | 6,512 |  |  | 6,515 |  |  | (3) |
Rabbi Trust Assets | 509 |  |  | 499 |  |  | 10 |
Total | $ | 17,515 |  |  | $ | 17,242 |  |  | $ | 273 |
____________________________ (1)There were no loans held for sale that were designated as nonaccrual or 90 days or more past due at December 31, 2024. Please see the Loans Held for Sale section below for more details. Changes in the fair value of assets for which the Company elected the fair value option are classified in the Consolidated Statements of Income line items reflected in the following table:
(Dollars in thousands) | Three Months Ended September 30, |  | Nine Months Ended September 30, |  |
Changes in fair value included in noninterest income: | 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |  |  |
Mortgage banking revenue (loans held for sale)(1) | $ | — |  |  | $ | (273) |  |  | $ | — |  |  | $ | (139) |  |  |  |  |  |  |
Other income: |  |  |  |  |  |  |  |  |  |  |  |  |
Securities carried at fair value through income | (15) |  |  | 35 |  |  | 6 |  |  | 25 |  |  |  |  |  |  |
Total fair value option impact on noninterest income | $ | (15) |  |  | $ | (238) |  |  | $ | 6 |  |  | $ | (114) |  |  |  |  |  |  |
Changes in fair value included in noninterest expense: |  |  |  |  |  |  |  |  |  |  |  |  |
Rabbi Trust assets | $ | (17) |  |  | $ | — |  |  | $ | (37) |  |  | $ | — |  |  |  |  |  |  |
Deferred compensation liabilities related to Rabbi Trust assets(2) | 17 |  |  | — |  |  | 37 |  |  | — |  |  |  |  |  |  |
Total fair value option impact on noninterest expense | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  |  |  |  |  |
____________________________ (1)Please see the Loans Held for Sale section below for more details. (2)Please see the Rabbi Trust section below for more detail on its impact on the Company’s net income.
Schedule of Carrying Value and Estimated Fair Value of Financial Instruments Not Measured at Fair Value | The carrying value and estimated fair values of financial instruments not recorded at fair value are as follows:
(Dollars in thousands) | September 30, 2025 |  | December 31, 2024 |
Financial assets: Level 1 inputs: | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value |
Cash and cash equivalents | $ | 626,909 |  |  | $ | 626,909 |  |  | $ | 470,249 |  |  | $ | 470,249 |  |
Level 2 inputs: |  |  |  |  |  |  |  |
Non-marketable equity securities held in other financial institutions | 31,041 |  |  | 31,041 |  |  | 71,643 |  |  | 71,643 |  |
Accrued interest and loan fees receivable | 36,944 |  |  | 36,944 |  |  | 38,901 |  |  | 38,901 |  |
Level 3 inputs: |  |  |  |  |  |  |  |
Securities held to maturity | 10,559 |  |  | 10,018 |  |  | 11,095 |  |  | 10,456 |  |
LHFI, net | 7,440,840 |  |  | 7,294,810 |  |  | 7,482,653 |  |  | 7,209,866 |  |
Financial liabilities: |  |  |  |  |  |  |  |
Level 2 inputs: |  |  |  |  |  |  |  |
Deposits | 8,331,830 |  |  | 8,327,798 |  |  | 8,223,120 |  |  | 8,217,564 |  |
FHLB advances, repurchase agreements and other borrowings | 12,790 |  |  | 12,715 |  |  | 12,460 |  |  | 12,203 |  |
Subordinated indebtedness | 89,715 |  |  | 89,714 |  |  | 159,943 |  |  | 159,928 |  |
Accrued interest payable | 4,680 |  |  | 4,680 |  |  | 8,033 |  |  | 8,033 |  |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -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 information about asset and liability measured at fair value under fair value option. + 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/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 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-32 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-30 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 + 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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