v3.26.3
Loan Portfolio and Allowance for Credit Losses - Amortized Cost Basis of Loans Modified to Borrowers Experiencing Financial Difficulty and Financial Effects of Loan Modifications (Details) - Payment Delay [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 283 $ 572 $ 797
% of Total Class of Financing Receivable 0.00% 0.01% 0.01% 0.02%
Installment [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
New York And Other States [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 304 $ 514
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.01% 0.02%
New York And Other States [Member] | Installment [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.00% 0.00%
Florida [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 283 $ 268 $ 283
% of Total Class of Financing Receivable 0.00% 0.02% 0.01% 0.02%
Florida [Member] | Installment [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Commercial Real Estate [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Commercial Real Estate [Member] | New York And Other States [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.00% 0.00%
Commercial Real Estate [Member] | Florida [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Other [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Other [Member] | New York And Other States [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.00% 0.00%
Other [Member] | Florida [Member] | Commercial [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
First Mortgages [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 283 $ 572 $ 675
% of Total Class of Financing Receivable 0.00% 0.01% 0.01% 0.03%
First Mortgages [Member] | New York And Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 304 $ 392
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.01% 0.01%
First Mortgages [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 283 $ 268 $ 283
% of Total Class of Financing Receivable 0.00% 0.02% 0.02% 0.02%
Home Equity Loans [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Home Equity Loans [Member] | New York And Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.00% 0.00%
Home Equity Loans [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Home Equity Line of Credit [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 122
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
Home Equity Line of Credit [Member] | New York And Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified [1] $ 0 $ 0 $ 0 $ 122
% of Total Class of Financing Receivable [1] 0.00% 0.00% 0.00% 0.05%
Home Equity Line of Credit [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]        
Loan Portfolio and Allowance for Credit Losses [Abstract]        
Loans modified $ 0 $ 0 $ 0 $ 0
% of Total Class of Financing Receivable 0.00% 0.00% 0.00% 0.00%
[1] Includes New York, New Jersey, Vermont and Massachusetts.