Borrowed Funds - Subordinated Notes (Details) - Subordinated notes $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Subordinated notes maturing in 2028
Debt Instrument
Interest Rate	5.90%
Original Issue Amount	$ 300
Subordinated notes maturing in 2028 | Secured Overnight Financing Rate (SOFR)
Debt Instrument
Variable rate on spread	3.0416%
Subordinated notes maturing in 2030
Debt Instrument
Interest Rate	4.125%
Original Issue Amount	$ 150