Investment Securities - Allowance for Credit Losses on Held-to-Maturity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	$ 1,500	[1]	$ 1,500	$ 0
Debt Securities, Held-to-maturity, Credit Loss Expense (Reversal)	0		1,500
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Writeoff	0		0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery	0		0
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	140		140	0
Debt Securities, Held-to-maturity, Credit Loss Expense (Reversal)	0		140
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Writeoff	0		0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery	0		0
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	1,360		1,360	$ 0
Debt Securities, Held-to-maturity, Credit Loss Expense (Reversal)	0		1,360
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Writeoff	0		0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery	$ 0		$ 0

[1] Excludes accrued interest receivable of $13.4 million at December 31, 2023 which is recorded in "Other assets" on the consolidated balance shee