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Loans, Impaired Financing Receivables (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Impaired loans with no allocated ACL [Abstract]    
Troubled debt restructurings ("TDR") [1]   $ 93
Non - TDR [1]   1,367
Impaired loans with an allocated ACL [Abstract]    
TDR - allowance based on collateral [1]   9,027
TDR - allowance based on present value cash flow [1]   37,953
Non - TDR - allowance based on collateral [1]   1,873
Total impaired loans [1]   50,313
Amount of ACL allocated [Abstract]    
TDR - allowance based on collateral [1]   1,058
TDR - allowance based on present value cash flow [1]   3,755
Non - TDR - allowance based on collateral [1]   768
Total amount of ACL allocated [1]   5,581
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   1,460
Unpaid Principal Balance, with no related ACL recorded   1,865
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   49,212
Unpaid Principal Balance, with an ACL recorded   51,105
Recorded Investment   50,672
Unpaid Principal Balance   52,970
Related Allowance [1]   5,581
Accrued interest included in recorded investment   359
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] $ 1,721  
Interest Income Recognized, with no related ACL recorded [1] 8  
Average Recorded Investment, with an a ACL recorded [1] 57,880  
Interest Income Recognized, with an a ACL recorded [1] 878  
Average Recorded Investment [1] 59,601  
Interest Income Recognized [1] 886  
Commercial [Member] | Commercial and Industrial [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   77
Unpaid Principal Balance, with no related ACL recorded   80
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   2,227
Unpaid Principal Balance, with an ACL recorded   2,370
Recorded Investment   2,304
Unpaid Principal Balance   2,450
Related Allowance [1]   756
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 171  
Interest Income Recognized, with no related ACL recorded [1] 1  
Average Recorded Investment, with an a ACL recorded [1] 2,032  
Interest Income Recognized, with an a ACL recorded [1] 38  
Average Recorded Investment [1] 2,203  
Interest Income Recognized [1] 39  
Commercial [Member] | Commercial Real Estate [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   0
Unpaid Principal Balance, with no related ACL recorded   0
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   7,127
Unpaid Principal Balance, with an ACL recorded   7,096
Recorded Investment   7,127
Unpaid Principal Balance   7,096
Related Allowance [1]   510
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 398  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 11,120  
Interest Income Recognized, with an a ACL recorded [1] 223  
Average Recorded Investment [1] 11,518  
Interest Income Recognized [1] 223  
Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   623
Unpaid Principal Balance, with no related ACL recorded   629
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   506
Unpaid Principal Balance, with an ACL recorded   880
Recorded Investment   1,129
Unpaid Principal Balance   1,509
Related Allowance [1]   50
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 77  
Interest Income Recognized, with no related ACL recorded [1] 1  
Average Recorded Investment, with an a ACL recorded [1] 12,430  
Interest Income Recognized, with an a ACL recorded [1] 360  
Average Recorded Investment [1] 12,507  
Interest Income Recognized [1] 361  
Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   0
Unpaid Principal Balance, with no related ACL recorded   0
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   21,655
Unpaid Principal Balance, with an ACL recorded   22,311
Recorded Investment   21,655
Unpaid Principal Balance   22,311
Related Allowance [1]   2,300
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 299  
Interest Income Recognized, with no related ACL recorded [1] 4  
Average Recorded Investment, with an a ACL recorded [1] 5,381  
Interest Income Recognized, with an a ACL recorded [1] 4  
Average Recorded Investment [1] 5,680  
Interest Income Recognized [1] 8  
Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   305
Unpaid Principal Balance, with no related ACL recorded   473
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   4,335
Unpaid Principal Balance, with an ACL recorded   4,704
Recorded Investment   4,640
Unpaid Principal Balance   5,177
Related Allowance [1]   495
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 302  
Interest Income Recognized, with no related ACL recorded [1] 2  
Average Recorded Investment, with an a ACL recorded [1] 4,784  
Interest Income Recognized, with an a ACL recorded [1] 66  
Average Recorded Investment [1] 5,086  
Interest Income Recognized [1] 68  
Mortgage [Member] | 1-4 Family - 2nd Lien [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   301
Unpaid Principal Balance, with no related ACL recorded   304
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   811
Unpaid Principal Balance, with an ACL recorded   829
Recorded Investment   1,112
Unpaid Principal Balance   1,133
Related Allowance [1]   200
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 396  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 7,436  
Interest Income Recognized, with an a ACL recorded [1] 4  
Average Recorded Investment [1] 7,832  
Interest Income Recognized [1] 4  
Mortgage [Member] | Resort Lending [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   154
Unpaid Principal Balance, with no related ACL recorded   379
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   10,555
Unpaid Principal Balance, with an ACL recorded   10,764
Recorded Investment   10,709
Unpaid Principal Balance   11,143
Related Allowance [1]   1,079
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 77  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 11,827  
Interest Income Recognized, with an a ACL recorded [1] 141  
Average Recorded Investment [1] 11,904  
Interest Income Recognized [1] 141  
Installment [Member] | Boat Lending [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   0
Unpaid Principal Balance, with no related ACL recorded   0
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   7
Unpaid Principal Balance, with an ACL recorded   11
Recorded Investment   7
Unpaid Principal Balance   11
Related Allowance [1]   2
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 0  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 38  
Interest Income Recognized, with an a ACL recorded [1] 0  
Average Recorded Investment [1] 38  
Interest Income Recognized [1] 0  
Installment [Member] | Recreational Vehicle Lending [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   0
Unpaid Principal Balance, with no related ACL recorded   0
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   87
Unpaid Principal Balance, with an ACL recorded   100
Recorded Investment   87
Unpaid Principal Balance   100
Related Allowance [1]   19
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 0  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 65  
Interest Income Recognized, with an a ACL recorded [1] 1  
Average Recorded Investment [1] 65  
Interest Income Recognized [1] 1  
Installment [Member] | Other [Member]    
Impaired Loans by class [Abstract]    
Recorded Investment, with no related ACL recorded   0
Unpaid Principal Balance, with no related ACL recorded   0
Related Allowance, with no related ACL recorded [1]   0
Recorded Investment, with an ACL recorded   1,902
Unpaid Principal Balance, with an ACL recorded   2,040
Recorded Investment   1,902
Unpaid Principal Balance   2,040
Related Allowance [1]   $ 170
Average recorded investment in and interest income earned on impaired loans by class [Abstract]    
Average Recorded Investment, with no related ACL recorded [1] 1  
Interest Income Recognized, with no related ACL recorded [1] 0  
Average Recorded Investment, with an a ACL recorded [1] 2,767  
Interest Income Recognized, with an a ACL recorded [1] 41  
Average Recorded Investment [1] 2,768  
Interest Income Recognized [1] $ 41  
[1] Beginning January 1, 2021, calculation is based on CECL methodology. Prior to January 1, 2021, calculation was based on the probable incurred loss methodology.