Investments (Additional Information) (Details) - USD ($)	1 Months Ended
	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020
Schedule of Investments [Line Items]
Trading securities		$ 3,990,000	$ 4,428,000
AFS debt securities, allowance		0	0	$ 0
Net unrealized loss on debt securities, net of tax		(79,400,000)	1,200,000
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross			321,000
Deferred Tax Liabilities, Investments		21,700,000
Debt Securities, Held-to-maturity, Allowance for Credit Loss		0	0
Debt Securities, Held-to-Maturity, Excluded Accrued Interest from Amortized Cost		1,700,000	10,000
Security Owned And Pledged As Collateral Amortized Cost		821,900,000	640,100,000
Asset Pledged as Collateral
Schedule of Investments [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value		726,500,000	641,200,000
Transferred Securities
Schedule of Investments [Line Items]
AFS debt securities, fair value, transfer amount	$ 520,300,000
AFS debt securities, transfer, unrealized loss	$ 72,100,000
Net unrealized loss on debt securities, net of tax		52,200,000
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross		14,300,000
Available-for-sale Securities
Schedule of Investments [Line Items]
Interest Receivable		$ 1,900,000	$ 3,400,000