Investment Securities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale investment securities	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Investment Securities
Debt Securities, Available-for-sale [Line Items]
Average percent of amortized cost for securities in unrealized loss positions for more than 12 months	94.30%		94.30%