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v3.23.3

Investment Securities - Narrative (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) security | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) security
Investment securities total | $ 1,200,000 |  | $ 1,400,000
Securities with no stated contractual date, amortized cost | 800 |  |
Securities with no stated contractual date, fair value | 800 |  |
Amortized cost | 748,478 |  | 819,762
Available-for-sale Securities | 620,445 |  | 706,289
Held-to-maturity securities | 600,501 |  | $ 651,527
Purchases of available-for-sale securities | 0 | $ 260,249 |
Maturities and paydowns of available-for-sale securities | 71,339 | 116,002 |
Sales of available-for-sale securities | $ 0 | 0 |
Number of securities | security | 237 |  | 244
Purchases of held-to-maturity securities | $ 2,452 | 91,607 |
Maturities and paydowns of held-to-maturity securities | $ 53,947 | $ 93,201 |
Number of held-to-maturity securities in unrealized loss positions | security | 160 |  | 129
Held-to-maturity investment securities pledged as collateral | $ 600,500 |  | $ 355,300
Held-to-maturity investment securities held as collateral | 0 |  | 0
Accrued interest receivable from available-for-sale investment securities | 1,300 |  | 1,500
Accrued interest receivable from held-to-maturity investment securities | 1,300 |  | 1,100
Asset Pledged as Collateral |  |  |
Available-for-sale Securities | 0 |  | 0
Asset Pledged as Collateral | Federal Funds Purchased [Member] |  |  |
Available-for-sale Securities | $ 205,300 |  | $ 484,900
Financing Receivable, Pledging Purpose [Extensible Enumeration] | Noninterest-bearing Deposit Liabilities |  | Noninterest-bearing Deposit Liabilities

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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), without single maturity date and not allocated over maturity grouping. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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