Borrowings - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Line Of Credit Facility [Line Items]
Advance from the Federal Home Loan Bank	$ 380,400,000	$ 511,400,000
Guarantee from the FHLBNY through a standby letter of credit	71,200,000	21,500,000
Interest expense on FHLBNY advances	15,400,000	5,400,000	$ 2,200,000
Interest expense on FRBNY advances	10,000,000	0	$ 0
Overnight Line of Credit Advance
Line Of Credit Facility [Line Items]
Advance from the Federal Home Loan Bank	$ 0	6,000,000
FRBNY
Line Of Credit Facility [Line Items]
Percentage of total securities portfolio	50.50%
Securities portfolio amortized cost	$ 304,200,000
Outstanding term advances from FRBNY	$ 304,000,000	$ 0