Fair Value of Assets and Liabilities - Sensitivity of Fair Value of Loans Held for Sale (Details) - Loans Held For Sale - Fair Value, Measurements, Recurring $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale at fair value	$ 362,789
Discount rates, impact of 100 basis point increase	(4,628)
Discount rates, impact of 200 basis point increase	(9,160)
Expected credit loss rates on underlying loans, 10% adverse change	(4,292)
Expected credit loss rates on underlying loans, 20% adverse change	(8,530)
Expected prepayment rates, 10% adverse change	(660)
Expected prepayment rates, 20% adverse change	$ (1,244)
Measurement Input, Expected Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expected weighted-average life (in years)	1 year 6 months