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Investment Securities - Schedule of Income Earned on Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Non-taxable: |  |  |  |
Total | $ 46,898 | $ 55,050 | $ 94,155 | $ 113,051
Held-to-maturity |  |  |  |
Taxable: |  |  |  |
Taxable | 10,224 | 10,842 | 20,623 | 21,845
Non-taxable: |  |  |  |
Non-taxable | 10,052 | 10,097 | 20,103 | 20,197
Available-for-sale |  |  |  |
Taxable: |  |  |  |
Taxable | 21,009 | 28,441 | 42,194 | 59,636
Non-taxable: |  |  |  |
Non-taxable | $ 5,613 | $ 5,670 | $ 11,235 | $ 11,373

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- Definition Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities exempt from state, federal and other income tax. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph a -Publisher SEC Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph b -Subparagraph (1)(Instruction 4) -Publisher SEC + Details
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