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Repurchase Agreement Borrowings (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Available unpledged securities | $ 1,147,000 | $ 1,225,000
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 227,342 | 213,786
Debt Securities, Available-for-sale, Amortized Cost | 1,854,852 | 1,727,363
Debt Securities, Available-for-sale | 1,733,696 | 1,754,140
Securities Sold under Agreements to Repurchase [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 353,000 | 327,900
Debt Securities, Available-for-sale | 313,100 | 334,900
Maturity Overnight [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 227,342 | 213,786
Maturity Less than 30 Days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 0 | 0
Maturity 30 to 90 Days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 0 | 0
Maturity Greater than 90 Days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 0 | $ 0

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