Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Short-Term Debt [Line Items]
BTFP Advances	$ 95,000	$ 0	$ 150,000
FHLBNY Overnight Advances	0	20,000	10,000
FHLBNY Term Advances	8,600	6,500	14,300
Total Borrowings	103,600	26,500	174,300
Federal Home Loan Bank of New York	595,234	576,602	607,596
Federal Funds Purchased
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	28,000	28,000	52,000
Available Borrowing Capacity	28,000	28,000	52,000
Federal Home Loan Bank Advances
Short-Term Debt [Line Items]
Available Borrowing Capacity	556,634	550,102	449,296
Federal Reserve Bank Advances
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	868,693	738,511	722,493
Available Borrowing Capacity	$ 773,693	$ 738,511	$ 722,493