Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Short-Term Debt [Line Items]
BTFP Advances	$ 150,000	$ 0	$ 0
FHLBNY Overnight Advances	10,000	27,000	0
FHLBNY Term Advances	14,300	27,800	25,000
Total Borrowings	174,300	54,800	25,000
Federal Home Loan Bank of New York	607,596	663,259	799,544
Federal Funds Purchased
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	52,000	52,000	52,000
Available Borrowing Capacity	52,000	52,000	52,000
Federal Home Loan Bank Advances
Short-Term Debt [Line Items]
Available Borrowing Capacity	449,296	608,458	774,544
Federal Reserve Bank Advances
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	722,493	649,112	650,642
Available Borrowing Capacity	$ 722,493	$ 649,112	$ 650,642