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Loans (Commercial Loan Portfolio Categorized by Internally Assigned Asset Classification) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Commercial Business [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year $ 111,722 $ 351,185
Prior Fiscal Year 1 109,525 113,040
Prior Fiscal Year 2 78,618 83,233
Prior Fiscal Year 3 50,556 33,163
Prior Fiscal Year 4 17,345 8,438
Prior 15,223 17,934
Revolving Loans Amortized Cost Basis 303,202 187,155
Revolving Loans Converted to Term 0 0
Total 686,191 794,148
Commercial Business [Member] | Uncriticized [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 111,558 350,992
Prior Fiscal Year 1 109,269 112,469
Prior Fiscal Year 2 78,305 82,029
Prior Fiscal Year 3 49,811 31,990
Prior Fiscal Year 4 16,289 8,195
Prior 13,906 16,600
Revolving Loans Amortized Cost Basis 296,861 179,770
Revolving Loans Converted to Term 0 0
Total 675,999 782,045
Commercial Business [Member] | Special Mention [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 164 0
Prior Fiscal Year 1 41 360
Prior Fiscal Year 2 153 21
Prior Fiscal Year 3 23 709
Prior Fiscal Year 4 360 41
Prior 1,034 1,025
Revolving Loans Amortized Cost Basis 1,745 2,995
Revolving Loans Converted to Term 0 0
Total 3,520 5,151
Commercial Business [Member] | Substandard [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 193
Prior Fiscal Year 1 215 211
Prior Fiscal Year 2 160 1,183
Prior Fiscal Year 3 722 464
Prior Fiscal Year 4 696 202
Prior 283 309
Revolving Loans Amortized Cost Basis 4,596 4,390
Revolving Loans Converted to Term 0 0
Total 6,672 6,952
Commercial Business [Member] | Doubtful [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 0 0
Commercial Mortgage [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 220,762 324,852
Prior Fiscal Year 1 347,406 272,232
Prior Fiscal Year 2 233,761 185,234
Prior Fiscal Year 3 164,237 190,949
Prior Fiscal Year 4 156,752 87,174
Prior 221,896 192,487
Revolving Loans Amortized Cost Basis 3,736 973
Revolving Loans Converted to Term 0 0
Total 1,348,550 1,253,901
Commercial Mortgage [Member] | Uncriticized [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 208,019 310,364
Prior Fiscal Year 1 343,976 227,406
Prior Fiscal Year 2 181,132 163,839
Prior Fiscal Year 3 143,005 161,771
Prior Fiscal Year 4 142,828 74,915
Prior 172,277 154,399
Revolving Loans Amortized Cost Basis 3,736 731
Revolving Loans Converted to Term 0 0
Total 1,194,973 1,093,425
Commercial Mortgage [Member] | Special Mention [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 11,742 14,299
Prior Fiscal Year 1 3,041 42,305
Prior Fiscal Year 2 49,691 19,505
Prior Fiscal Year 3 9,622 27,530
Prior Fiscal Year 4 13,624 12,256
Prior 39,755 28,744
Revolving Loans Amortized Cost Basis 0 43
Revolving Loans Converted to Term 0 0
Total 127,475 144,682
Commercial Mortgage [Member] | Substandard [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 1,001 189
Prior Fiscal Year 1 389 2,521
Prior Fiscal Year 2 2,938 1,890
Prior Fiscal Year 3 11,610 1,648
Prior Fiscal Year 4 300 3
Prior 9,864 9,344
Revolving Loans Amortized Cost Basis 0 199
Revolving Loans Converted to Term 0 0
Total 26,102 15,794
Commercial Mortgage [Member] | Doubtful [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total $ 0 $ 0