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Loan Portfolio and Allowance for Credit Losses, Past Due (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans $ 4,464,354  
Recorded past due loans   $ 4,438,779
Number of days past due 90 days 90 days
Loans that are 90 days past due and still accruing interest $ 0 $ 0
New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 3,123,916  
Recorded past due loans [1]   3,132,378
Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,340,438  
Recorded past due loans   1,306,401
Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 17,659  
Recorded past due loans   16,159
Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 15,350  
Recorded past due loans [1]   13,807
Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 2,309  
Recorded past due loans   2,352
30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 3,546  
Recorded past due loans   2,708
30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 2,923  
Recorded past due loans [1]   1,821
30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 623  
Recorded past due loans   887
60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,454  
Recorded past due loans   1,249
60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 1,364  
Recorded past due loans [1]   935
60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 90  
Recorded past due loans   314
90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 12,659  
Recorded past due loans   12,202
90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 11,063  
Recorded past due loans [1]   11,051
90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,596  
Recorded past due loans   1,151
Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 4,446,695  
Recorded past due loans   4,422,620
Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 3,108,566  
Recorded past due loans [1]   3,118,571
Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,338,129  
Recorded past due loans   1,304,049
Commercial [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 192,408  
Commercial [Member] | Commercial Real Estate [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 171,230  
Recorded past due loans   168,716
Loans that are 90 days past due and still accruing interest 0  
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 147,295  
Recorded past due loans [1]   147,063
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 23,935  
Recorded past due loans   21,653
Commercial [Member] | Commercial Real Estate [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 229  
Recorded past due loans   278
Commercial [Member] | Commercial Real Estate [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 229  
Recorded past due loans [1]   278
Commercial [Member] | Commercial Real Estate [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 0  
Recorded past due loans [1]   0
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 106  
Recorded past due loans   233
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 106  
Recorded past due loans [1]   233
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 123  
Recorded past due loans   45
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 123  
Recorded past due loans [1]   45
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Commercial Real Estate [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 171,001  
Recorded past due loans   168,438
Commercial [Member] | Commercial Real Estate [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 147,066  
Recorded past due loans [1]   146,785
Commercial [Member] | Commercial Real Estate [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 23,935  
Recorded past due loans   21,653
Commercial [Member] | Other [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 21,178  
Recorded past due loans   31,484
Loans that are 90 days past due and still accruing interest 0  
Commercial [Member] | Other [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 20,198  
Recorded past due loans [1]   30,889
Commercial [Member] | Other [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 980  
Recorded past due loans   595
Commercial [Member] | Other [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 31  
Recorded past due loans   0
Commercial [Member] | Other [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 31  
Recorded past due loans [1]   0
Commercial [Member] | Other [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 27  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 27  
Recorded past due loans [1]   0
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 0  
Recorded past due loans [1]   0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 4  
Recorded past due loans   0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 4  
Recorded past due loans [1]   0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Commercial [Member] | Other [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 21,147  
Recorded past due loans   31,484
Commercial [Member] | Other [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 20,167  
Recorded past due loans [1]   30,889
Commercial [Member] | Other [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 980  
Recorded past due loans   595
Real Estate Mortgage - 1 to 4 Family [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 4,262,551  
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 3,965,962  
Recorded past due loans   3,936,302
Loans that are 90 days past due and still accruing interest 0  
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 2,729,257  
Recorded past due loans [1]   2,723,734
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,236,705  
Recorded past due loans   1,212,568
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 15,060  
Recorded past due loans   13,604
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 12,885  
Recorded past due loans [1]   11,409
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 2,175  
Recorded past due loans   2,195
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 2,737  
Recorded past due loans   2,172
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 2,114  
Recorded past due loans [1]   1,303
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 623  
Recorded past due loans   869
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,209  
Recorded past due loans   419
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 1,209  
Recorded past due loans [1]   239
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   180
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 11,114  
Recorded past due loans   11,013
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 9,562  
Recorded past due loans [1]   9,867
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,552  
Recorded past due loans   1,146
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 3,950,902  
Recorded past due loans   3,922,698
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 2,716,372  
Recorded past due loans [1]   2,712,325
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,234,530  
Recorded past due loans   1,210,373
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 60,472  
Recorded past due loans   61,885
Loans that are 90 days past due and still accruing interest 0  
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 47,043  
Recorded past due loans [1]   48,190
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 13,429  
Recorded past due loans   13,695
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 236  
Recorded past due loans   405
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 192  
Recorded past due loans [1]   360
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 44  
Recorded past due loans   45
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 19  
Recorded past due loans   136
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 19  
Recorded past due loans [1]   136
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   45
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 0  
Recorded past due loans [1]   0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   45
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 217  
Recorded past due loans   224
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 173  
Recorded past due loans [1]   224
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 44  
Recorded past due loans   0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 60,236  
Recorded past due loans   61,480
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 46,851  
Recorded past due loans [1]   47,830
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 13,385  
Recorded past due loans   13,650
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 236,117  
Recorded past due loans   230,976
Loans that are 90 days past due and still accruing interest 0  
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 172,854  
Recorded past due loans [1]   175,134
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 63,263  
Recorded past due loans   55,842
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 2,028  
Recorded past due loans   1,813
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 1,939  
Recorded past due loans [1]   1,724
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 89  
Recorded past due loans   89
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 727  
Recorded past due loans   355
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 727  
Recorded past due loans [1]   355
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 114  
Recorded past due loans   547
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 25  
Recorded past due loans [1]   458
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 89  
Recorded past due loans   89
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,187  
Recorded past due loans   911
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 1,187  
Recorded past due loans [1]   911
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 234,089  
Recorded past due loans   229,163
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 170,915  
Recorded past due loans [1]   173,410
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 63,174  
Recorded past due loans   55,753
Installment [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 9,395  
Recorded past due loans   9,416
Loans that are 90 days past due and still accruing interest 0  
Installment [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 7,269  
Recorded past due loans [1]   7,368
Installment [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 2,126  
Recorded past due loans   2,048
Installment [Member] | Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 75  
Recorded past due loans   59
Installment [Member] | Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 74  
Recorded past due loans [1]   36
Installment [Member] | Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1  
Recorded past due loans   23
Installment [Member] | 30-59 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 36  
Recorded past due loans   45
Installment [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 36  
Recorded past due loans [1]   27
Installment [Member] | 30-59 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   18
Installment [Member] | 60-89 Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 25  
Recorded past due loans   5
Installment [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 24  
Recorded past due loans [1]   5
Installment [Member] | 60-89 Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1  
Recorded past due loans   0
Installment [Member] | 90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 14  
Recorded past due loans   9
Installment [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 14  
Recorded past due loans [1]   4
Installment [Member] | 90+ Days Past Due [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 0  
Recorded past due loans   5
Installment [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 9,320  
Recorded past due loans   9,357
Installment [Member] | Current [Member] | New York and Other States [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans [1] 7,195  
Recorded past due loans [1]   7,332
Installment [Member] | Current [Member] | Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans $ 2,125  
Recorded past due loans   $ 2,025
[1] Includes New York, New Jersey, Vermont and Massachusetts.