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Loans - Residential, Home Equity and Consumer Loans Based on Payment Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]      
Total $ 5,654,944   $ 4,133,267
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]      
Total 625 $ 1,061  
Consumer Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 10,286   40,530
Year two 54,184   20,829
Year three 21,679   9,372
Year four 10,959   5,484
Year five 6,011   1,181
Prior 3,773   1,550
Revolving Loans Amortized Cost Basis 3,282   2,450
Total 110,174   81,396
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]      
Year one 261   1,212
Year two 15   181
Year three 23   72
Year four 11   40
Year five 15   0
Prior 0   2
Revolving Loans Amortized Cost Basis 0   4
Total 325 368 1,511
Consumer Loans | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 10,286   40,504
Year two 54,181   20,828
Year three 21,670   9,359
Year four 10,941   5,469
Year five 6,011   1,181
Prior 3,772   1,542
Revolving Loans Amortized Cost Basis 3,280   2,450
Total 110,141   81,333
Consumer Loans | Nonperforming      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0   26
Year two 3   1
Year three 9   13
Year four 18   15
Year five 0   0
Prior 1   8
Revolving Loans Amortized Cost Basis 2   0
Total 33   63
Home Equity Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0   172
Year two 489   289
Year three 856   3,998
Year four 4,423   797
Year five 831   503
Prior 4,955   4,136
Revolving Loans Amortized Cost Basis 394,726   334,913
Total 406,280   344,808
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]      
Year one 0   0
Year two 0   0
Year three 0   62
Year four 0   99
Year five 0   0
Prior 0   0
Revolving Loans Amortized Cost Basis 0   9
Total 0 134 170
Home Equity Loans | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0   172
Year two 489   161
Year three 728   3,721
Year four 4,022   773
Year five 789   478
Prior 4,537   3,532
Revolving Loans Amortized Cost Basis 394,726   334,884
Total 405,291   343,721
Home Equity Loans | Nonperforming      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0   0
Year two 0   128
Year three 128   277
Year four 401   24
Year five 42   25
Prior 418   604
Revolving Loans Amortized Cost Basis 0   29
Total 989   1,087
Residential Mortgage Loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 15,575   48,957
Year two 86,600   51,273
Year three 111,973   58,217
Year four 206,947   73,908
Year five 157,168   35,604
Prior 209,959   89,489
Revolving Loans Amortized Cost Basis 0   0
Total 788,222   357,448
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]      
Year one 0   0
Year two 0   0
Year three 0   0
Year four 0   0
Year five 0   0
Prior 0   0
Revolving Loans Amortized Cost Basis 0   0
Total 0 $ 0 0
Residential Mortgage Loans | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 15,575   48,957
Year two 86,517   51,059
Year three 111,678   57,988
Year four 205,593   73,239
Year five 155,912   35,370
Prior 208,221   88,633
Revolving Loans Amortized Cost Basis 0   0
Total 783,496   355,246
Residential Mortgage Loans | Nonperforming      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0   0
Year two 83   214
Year three 295   229
Year four 1,354   669
Year five 1,256   234
Prior 1,738   856
Revolving Loans Amortized Cost Basis 0   0
Total $ 4,726   $ 2,202