Repurchase Agreement Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
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