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Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Contract
Dec. 31, 2020
USD ($)
Contract
Dec. 31, 2019
USD ($)
Contract
Financing Receivable Modifications Information [Abstract]      
TDR's classifications from previously performing loans $ 10,700 $ 11,700  
New York and Other States [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract [1] 9 16 21
Pre-Modification Outstanding Recorded Investment [1] $ 1,156 $ 2,597 $ 2,981
Post-Modification Outstanding Recorded Investment [1] $ 1,156 $ 2,597 $ 2,981
Florida [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract 2 4 6
Pre-Modification Outstanding Recorded Investment $ 127 $ 586 $ 632
Post-Modification Outstanding Recorded Investment $ 127 $ 586 $ 632
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract [1] 0 1 1
Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 125 $ 125
Post-Modification Outstanding Recorded Investment [1] $ 0 $ 125 $ 125
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract [1] 6 12 18
Pre-Modification Outstanding Recorded Investment [1] $ 1,114 $ 2,303 $ 2,621
Post-Modification Outstanding Recorded Investment [1] $ 1,114 $ 2,303 $ 2,621
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract 1 4 6
Pre-Modification Outstanding Recorded Investment $ 77 $ 586 $ 632
Post-Modification Outstanding Recorded Investment $ 77 $ 586 $ 632
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract [1] 1 0 0
Pre-Modification Outstanding Recorded Investment [1] $ 2 $ 0 $ 0
Post-Modification Outstanding Recorded Investment [1] $ 2 $ 0 $ 0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract 0 0 0
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 0
Post-Modification Outstanding Recorded Investment $ 0 $ 0 $ 0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract [1] 2 3 2
Pre-Modification Outstanding Recorded Investment [1] $ 40 $ 169 $ 235
Post-Modification Outstanding Recorded Investment [1] $ 40 $ 169 $ 235
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]      
Modified loans by class determined to be TDR's [Abstract]      
Number of Contracts | Contract 1 0 0
Pre-Modification Outstanding Recorded Investment $ 50 $ 0 $ 0
Post-Modification Outstanding Recorded Investment $ 50 $ 0 $ 0
[1] Includes New York, New Jersey, Vermont and Massachusetts.