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Loan Portfolio and Allowance for Credit Losses, Past Due (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans $ 4,629,491  
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] 3,187,037  
Recorded past due loans [1]   3,132,378
Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,442,454  
Recorded past due loans   1,306,401
Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 16,367  
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] 14,209  
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 2,158  
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 2,684  
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] 2,441  
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 243  
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 2,955  
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] 2,710  
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 245  
Recorded past due loans   314
90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 10,728  
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] 9,058  
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 1,670  
Recorded past due loans   1,151
Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 4,613,124  
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] 3,172,828  
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 1,440,296  
Recorded past due loans   1,304,049
Commercial [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 217,120  
Commercial [Member] | Commercial Real Estate [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 197,158  
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] 165,888  
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 31,270  
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 162  
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] 162  
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 39  
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] 39  
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 0  
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] 0  
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 196,996  
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] 165,726  
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 31,270  
Recorded past due loans   21,653
Commercial [Member] | Other [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 19,962  
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] 19,089  
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 873  
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 130  
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] 6  
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 124  
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 124  
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] 0  
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 124  
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 6  
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] 6  
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 19,832  
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] 19,083  
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 749  
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 4,401,706  
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 4,074,713  
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] 2,762,616  
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 1,312,097  
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 14,525  
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] 12,591  
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 1,934  
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 2,075  
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] 1,994  
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 81  
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 2,714  
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] 2,469  
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 245  
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 9,736  
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] 8,128  
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 1,608  
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 4,060,188  
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] 2,750,025  
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 1,310,163  
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 57,652  
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] 45,115  
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 12,537  
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 174  
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] 167  
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 7  
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 53  
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] 46  
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 7  
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 66  
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] 66  
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 55  
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] 55  
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 0  
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 57,478  
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] 44,948  
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 12,530  
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 269,341  
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] 186,146  
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 83,195  
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 1,270  
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] 1,239  
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 31  
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 390  
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] 359  
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 31  
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 150  
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] 150  
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 0  
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 730  
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] 730  
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 268,071  
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] 184,907  
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 83,164  
Recorded past due loans   55,753
Installment [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 10,665  
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] 8,183  
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 2,482  
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 106  
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] 44  
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 62  
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 3  
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] 3  
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] 25  
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 0  
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 78  
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] 16  
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 62  
Recorded past due loans   5
Installment [Member] | Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 10,559  
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] 8,139  
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 $ 2,420  
Recorded past due loans   $ 2,025
[1] Includes New York, New Jersey, Vermont and Massachusetts.