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Investment Securities - Income Earned on Securities (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Non-taxable: |  |
Total | $ 58,001 | $ 48,774
Held-to-maturity |  |
Taxable: |  |
Taxable | 11,003 | 11,013
Non-taxable: |  |
Non-taxable | 10,100 | 10,126
Available-for-sale |  |
Taxable: |  |
Taxable | 31,195 | 21,791
Non-taxable: |  |
Non-taxable | $ 5,703 | $ 5,844

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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://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (b) -Subparagraph (1) -Publisher SEC Reference 3: 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//1943274/2147483589/942-220-S99-1 + Details
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