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Loan Portfolio and Allowance for Credit Losses, Past Due (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans $ 4,540,559  
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] 3,152,645  
Recorded past due loans [1]   3,132,378
Florida [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 1,387,914  
Recorded past due loans   1,306,401
Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 15,943  
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] 13,825  
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 2,118  
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 2,036  
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] 1,897  
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 139  
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 2,114  
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] 1,687  
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 427  
Recorded past due loans   314
90+ Days Past Due [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 11,793  
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] 10,241  
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 1,552  
Recorded past due loans   1,151
Current [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 4,524,616  
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] 3,138,820  
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 1,385,796  
Recorded past due loans   1,304,049
Commercial [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 199,886  
Commercial [Member] | Commercial Real Estate [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 179,624  
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] 151,978  
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 27,646  
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 123  
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] 123  
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 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 179,501  
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] 151,855  
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 27,646  
Recorded past due loans   21,653
Commercial [Member] | Other [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 20,262  
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] 19,134  
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 1,128  
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 41  
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] 41  
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 35  
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] 35  
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 6  
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] 6  
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 0  
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] 0  
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 20,221  
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] 19,093  
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 1,128  
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 4,330,415  
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 4,018,378  
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] 2,747,210  
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 1,271,168  
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 14,018  
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] 12,096  
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 1,922  
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 1,632  
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] 1,554  
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 78  
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 1,651  
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] 1,359  
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 292  
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 10,735  
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] 9,183  
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 4,004,360  
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] 2,735,114  
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 1,269,246  
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 58,279  
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] 45,428  
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 12,851  
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] 131  
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 43  
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 69  
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] 26  
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 43  
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 50  
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] 50  
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 58,105  
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] 45,297  
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 12,808  
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 253,758  
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] 180,720  
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 73,038  
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 1,474  
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] 1,385  
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 264  
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] 264  
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 353  
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] 264  
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 857  
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] 857  
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 252,284  
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] 179,335  
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 72,949  
Recorded past due loans   55,753
Installment [Member]    
Aging of the recorded investment in past due loans [Abstract]    
Recorded past due loans 10,258  
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] 8,175  
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 2,083  
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 113  
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] 49  
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 64  
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] 18  
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 18  
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 54  
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] 8  
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 46  
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 23  
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] 23  
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 10,145  
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] 8,126  
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 $ 2,019  
Recorded past due loans   $ 2,025
[1] Includes New York, New Jersey, Vermont and Massachusetts.