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Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period $ 47,776 $ 21,907    
Cumulative effect of ASU 2016-13 adoption (CECL) 39,776 47,776 $ 21,907  
Provision for credit losses (8,000) 7,000    
Balance at end of period 39,776 47,776 21,907  
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses (88,011) 174,006 16,000  
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 47,776      
Cumulative effect of ASU 2016-13 adoption (CECL)   47,776   $ 40,597
Balance at end of period   47,776    
First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses 0 179    
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       18,690
Allowance for Loan Losses [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 383,702 201,371    
Financing Receivable, Allowance for Credit Loss 280,015 383,702 201,371  
Financing Receivable, Allowance for Credit Loss, Writeoff (40,652) (112,053)    
Financing Receivable, Allowance for Credit Loss, Recovery 16,965 11,422    
Net Charge offs (23,687) (100,631)    
Gross up of allowance for PCD loans at acquistion   3,504    
Provision for loan losses (80,000) 164,457    
Financing Receivable, Allowance for Credit Loss, Ending Balance 280,015 383,702 201,371  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 16,965 11,422    
Net Charge offs (23,687) (100,631)    
Gross up of allowance for PCD loans at acquistion   3,504    
Allowance for Loan Losses [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   313,828    
Financing Receivable, Allowance for Credit Loss     313,828  
Financing Receivable, Allowance for Credit Loss, Ending Balance     313,828  
Allowance for Loan Losses [Member] | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   2,543    
Allowance for Loan Losses [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       112,457
Allowance for Loan Losses [Member] | PPP        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 531 0    
Financing Receivable, Allowance for Credit Loss 51 531 0  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0    
Financing Receivable, Allowance for Credit Loss, Recovery 0 0    
Net Charge offs 0 0    
Gross up of allowance for PCD loans at acquistion   0    
Provision for loan losses (480) 531    
Financing Receivable, Allowance for Credit Loss, Ending Balance 51 531 0  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 0 0    
Net Charge offs 0 0    
Gross up of allowance for PCD loans at acquistion   0    
Allowance for Loan Losses [Member] | PPP | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   0    
Financing Receivable, Allowance for Credit Loss     0  
Financing Receivable, Allowance for Credit Loss, Ending Balance     0  
Allowance for Loan Losses [Member] | PPP | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   0    
Allowance for Loan Losses [Member] | PPP | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       0
Allowance for Loan Losses [Member] | Asset-based Lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 2,077 3,407    
Financing Receivable, Allowance for Credit Loss 4,182 2,077 3,407  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 (6,650)    
Financing Receivable, Allowance for Credit Loss, Recovery 412 561    
Net Charge offs 412 (6,090)    
Gross up of allowance for PCD loans at acquistion   0    
Provision for loan losses 1,693 4,697    
Financing Receivable, Allowance for Credit Loss, Ending Balance 4,182 2,077 3,407  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 412 561    
Net Charge offs 412 (6,090)    
Gross up of allowance for PCD loans at acquistion   0    
Allowance for Loan Losses [Member] | Asset-based Lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   3,470    
Financing Receivable, Allowance for Credit Loss     3,470  
Financing Receivable, Allowance for Credit Loss, Ending Balance     3,470  
Allowance for Loan Losses [Member] | Asset-based Lending | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   0    
Allowance for Loan Losses [Member] | Asset-based Lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       64
Allowance for Loan Losses [Member] | Commercial and industrial        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 140,716 87,727    
Financing Receivable, Allowance for Credit Loss 85,624 140,716 87,727  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,564) (73,670)    
Financing Receivable, Allowance for Credit Loss, Recovery 8,152 6,444    
Net Charge offs (13,412) (67,226)    
Gross up of allowance for PCD loans at acquistion   293    
Provision for loan losses (41,680) 66,658    
Financing Receivable, Allowance for Credit Loss, Ending Balance 85,624 140,716 87,727  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 8,152 6,444    
Net Charge offs (13,412) (67,226)    
Gross up of allowance for PCD loans at acquistion   293    
Allowance for Loan Losses [Member] | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   140,582    
Financing Receivable, Allowance for Credit Loss     140,582  
Financing Receivable, Allowance for Credit Loss, Ending Balance     140,582  
Allowance for Loan Losses [Member] | Commercial and industrial | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   408    
Allowance for Loan Losses [Member] | Commercial and industrial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       52,856
Allowance for Loan Losses [Member] | Commercial real estate - owner occupied        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 11,274 10,284    
Financing Receivable, Allowance for Credit Loss 11,473 11,274 10,284  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 (419)    
Financing Receivable, Allowance for Credit Loss, Recovery 120 147    
Net Charge offs 120 (272)    
Gross up of allowance for PCD loans at acquistion   890    
Provision for loan losses 80 1,967    
Financing Receivable, Allowance for Credit Loss, Ending Balance 11,473 11,274 10,284  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 120 147    
Net Charge offs 120 (272)    
Gross up of allowance for PCD loans at acquistion   890    
Allowance for Loan Losses [Member] | Commercial real estate - owner occupied | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   8,433    
Financing Receivable, Allowance for Credit Loss     8,433  
Financing Receivable, Allowance for Credit Loss, Ending Balance     8,433  
Allowance for Loan Losses [Member] | Commercial real estate - owner occupied | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   255    
Allowance for Loan Losses [Member] | Commercial real estate - owner occupied | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       (1,851)
Allowance for Loan Losses [Member] | Commercial and business lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 154,598 101,417    
Financing Receivable, Allowance for Credit Loss 101,330 154,598 101,417  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,564) (80,739)    
Financing Receivable, Allowance for Credit Loss, Recovery 8,684 7,151    
Net Charge offs (12,880) (73,588)    
Gross up of allowance for PCD loans at acquistion   1,183    
Provision for loan losses (40,388) 73,853    
Financing Receivable, Allowance for Credit Loss, Ending Balance 101,330 154,598 101,417  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 8,684 7,151    
Net Charge offs (12,880) (73,588)    
Gross up of allowance for PCD loans at acquistion   1,183    
Allowance for Loan Losses [Member] | Commercial and business lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   152,485    
Financing Receivable, Allowance for Credit Loss     152,485  
Financing Receivable, Allowance for Credit Loss, Ending Balance     152,485  
Allowance for Loan Losses [Member] | Commercial and business lending | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   663    
Allowance for Loan Losses [Member] | Commercial and business lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       51,068
Allowance for Loan Losses [Member] | Commercial real estate - investor        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 93,435 40,514    
Financing Receivable, Allowance for Credit Loss 72,803 93,435 40,514  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,346) (22,920)    
Financing Receivable, Allowance for Credit Loss, Recovery 3,162 643    
Net Charge offs (11,184) (22,277)    
Gross up of allowance for PCD loans at acquistion   753    
Provision for loan losses (9,448) 71,933    
Financing Receivable, Allowance for Credit Loss, Ending Balance 72,803 93,435 40,514  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 3,162 643    
Net Charge offs (11,184) (22,277)    
Gross up of allowance for PCD loans at acquistion   753    
Allowance for Loan Losses [Member] | Commercial real estate - investor | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   42,555    
Financing Receivable, Allowance for Credit Loss     42,555  
Financing Receivable, Allowance for Credit Loss, Ending Balance     42,555  
Allowance for Loan Losses [Member] | Commercial real estate - investor | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   472    
Allowance for Loan Losses [Member] | Commercial real estate - investor | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       2,041
Allowance for Loan Losses [Member] | Real estate construction        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 59,193 24,915    
Financing Receivable, Allowance for Credit Loss 37,643 59,193 24,915  
Financing Receivable, Allowance for Credit Loss, Writeoff (5) (19)    
Financing Receivable, Allowance for Credit Loss, Recovery 126 49    
Net Charge offs 121 31    
Gross up of allowance for PCD loans at acquistion   435    
Provision for loan losses (21,672) 25,854    
Financing Receivable, Allowance for Credit Loss, Ending Balance 37,643 59,193 24,915  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 126 49    
Net Charge offs 121 31    
Gross up of allowance for PCD loans at acquistion   435    
Allowance for Loan Losses [Member] | Real estate construction | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   32,382    
Financing Receivable, Allowance for Credit Loss     32,382  
Financing Receivable, Allowance for Credit Loss, Ending Balance     32,382  
Allowance for Loan Losses [Member] | Real estate construction | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   492    
Allowance for Loan Losses [Member] | Real estate construction | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       7,467
Allowance for Loan Losses [Member] | Commercial real estate lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 152,629 65,428    
Financing Receivable, Allowance for Credit Loss 110,446 152,629 65,428  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,351) (22,938)    
Financing Receivable, Allowance for Credit Loss, Recovery 3,288 692    
Net Charge offs (11,063) (22,246)    
Gross up of allowance for PCD loans at acquistion   1,188    
Provision for loan losses (31,120) 97,787    
Financing Receivable, Allowance for Credit Loss, Ending Balance 110,446 152,629 65,428  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 3,288 692    
Net Charge offs (11,063) (22,246)    
Gross up of allowance for PCD loans at acquistion   1,188    
Allowance for Loan Losses [Member] | Commercial real estate lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   74,937    
Financing Receivable, Allowance for Credit Loss     74,937  
Financing Receivable, Allowance for Credit Loss, Ending Balance     74,937  
Allowance for Loan Losses [Member] | Commercial real estate lending | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   964    
Allowance for Loan Losses [Member] | Commercial real estate lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       9,508
Allowance for Loan Losses [Member] | Total commercial        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 307,226 166,846    
Financing Receivable, Allowance for Credit Loss 211,776 307,226 166,846  
Financing Receivable, Allowance for Credit Loss, Writeoff (35,915) (103,677)    
Financing Receivable, Allowance for Credit Loss, Recovery 11,972 7,844    
Net Charge offs (23,943) (95,834)    
Gross up of allowance for PCD loans at acquistion   2,371    
Provision for loan losses (71,508) 171,641    
Financing Receivable, Allowance for Credit Loss, Ending Balance 211,776 307,226 166,846  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 11,972 7,844    
Net Charge offs (23,943) (95,834)    
Gross up of allowance for PCD loans at acquistion   2,371    
Allowance for Loan Losses [Member] | Total commercial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   227,422    
Financing Receivable, Allowance for Credit Loss     227,422  
Financing Receivable, Allowance for Credit Loss, Ending Balance     227,422  
Allowance for Loan Losses [Member] | Total commercial | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   1,627    
Allowance for Loan Losses [Member] | Total commercial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       60,576
Allowance for Loan Losses [Member] | Residential mortgage        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 42,996 16,960    
Financing Receivable, Allowance for Credit Loss 40,787 42,996 16,960  
Financing Receivable, Allowance for Credit Loss, Writeoff (880) (1,867)    
Financing Receivable, Allowance for Credit Loss, Recovery 841 500    
Net Charge offs (38) (1,367)    
Gross up of allowance for PCD loans at acquistion   651    
Provision for loan losses (2,170) (6,864)    
Financing Receivable, Allowance for Credit Loss, Ending Balance 40,787 42,996 16,960  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 841 500    
Net Charge offs (38) (1,367)    
Gross up of allowance for PCD loans at acquistion   651    
Allowance for Loan Losses [Member] | Residential mortgage | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   50,175    
Financing Receivable, Allowance for Credit Loss     50,175  
Financing Receivable, Allowance for Credit Loss, Ending Balance     50,175  
Allowance for Loan Losses [Member] | Residential mortgage | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   403    
Allowance for Loan Losses [Member] | Residential mortgage | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       33,215
Allowance for Loan Losses [Member] | Home equity        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 18,849 10,926    
Financing Receivable, Allowance for Credit Loss 14,011 18,849 10,926  
Financing Receivable, Allowance for Credit Loss, Writeoff (668) (1,719)    
Financing Receivable, Allowance for Credit Loss, Recovery 2,854 1,978    
Net Charge offs 2,186 259    
Gross up of allowance for PCD loans at acquistion   422    
Provision for loan losses (7,024) (4,781)    
Financing Receivable, Allowance for Credit Loss, Ending Balance 14,011 18,849 10,926  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 2,854 1,978    
Net Charge offs 2,186 259    
Gross up of allowance for PCD loans at acquistion   422    
Allowance for Loan Losses [Member] | Home equity | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   22,575    
Financing Receivable, Allowance for Credit Loss     22,575  
Financing Receivable, Allowance for Credit Loss, Ending Balance     22,575  
Allowance for Loan Losses [Member] | Home equity | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   374    
Allowance for Loan Losses [Member] | Home equity | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       11,649
Allowance for Loan Losses [Member] | Installment and Credit Cards Portfolio Segment, Excluding Auto        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 14,456      
Financing Receivable, Allowance for Credit Loss   14,456    
Financing Receivable, Allowance for Credit Loss, Ending Balance   14,456    
Allowance for Loan Losses [Member] | Auto        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 174      
Financing Receivable, Allowance for Credit Loss 1,999 174    
Financing Receivable, Allowance for Credit Loss, Writeoff (22)      
Financing Receivable, Allowance for Credit Loss, Recovery 31      
Net Charge offs 9      
Provision for loan losses 1,816      
Financing Receivable, Allowance for Credit Loss, Ending Balance 1,999 174    
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 31      
Net Charge offs 9      
Allowance for Loan Losses [Member] | Other consumer(a)        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 14,630 6,639    
Financing Receivable, Allowance for Credit Loss 11,441 14,630 6,639  
Financing Receivable, Allowance for Credit Loss, Writeoff (3,168) (4,790)    
Financing Receivable, Allowance for Credit Loss, Recovery 1,267 1,101    
Net Charge offs (1,901) (3,689)    
Gross up of allowance for PCD loans at acquistion   61    
Provision for loan losses (1,113) 4,462    
Financing Receivable, Allowance for Credit Loss, Ending Balance 11,441 14,630 6,639  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 1,267 1,101    
Net Charge offs (1,901) (3,689)    
Gross up of allowance for PCD loans at acquistion   61    
Allowance for Loan Losses [Member] | Other consumer(a) | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   13,655    
Financing Receivable, Allowance for Credit Loss     13,655  
Financing Receivable, Allowance for Credit Loss, Ending Balance     13,655  
Allowance for Loan Losses [Member] | Other consumer(a) | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   140    
Allowance for Loan Losses [Member] | Other consumer(a) | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       7,016
Allowance for Loan Losses [Member] | Total consumer        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance 76,475 34,525    
Financing Receivable, Allowance for Credit Loss 68,239 76,475 34,525  
Financing Receivable, Allowance for Credit Loss, Writeoff (4,738) (8,376)    
Financing Receivable, Allowance for Credit Loss, Recovery 4,993 3,579    
Net Charge offs 256 (4,797)    
Gross up of allowance for PCD loans at acquistion   1,134    
Provision for loan losses (8,492) (7,183)    
Financing Receivable, Allowance for Credit Loss, Ending Balance 68,239 76,475 34,525  
Allowance for Credit Losses on Loans [Abstract]        
Financing Receivable, Allowance for Credit Loss, Recovery 4,993 3,579    
Net Charge offs 256 (4,797)    
Gross up of allowance for PCD loans at acquistion   1,134    
Allowance for Loan Losses [Member] | Total consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Beginning Balance   86,405    
Financing Receivable, Allowance for Credit Loss     86,405  
Financing Receivable, Allowance for Credit Loss, Ending Balance     86,405  
Allowance for Loan Losses [Member] | Total consumer | First Staunton Bancshares        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Provision for loan losses   917    
Allowance for Loan Losses [Member] | Total consumer | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss       51,880
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 47,776 21,907    
Cumulative effect of ASU 2016-13 adoption (CECL) 39,776 47,776 21,907  
Provision for credit losses (8,000) 7,000    
Balance at end of period 39,776 47,776 21,907  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       40,597
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   179    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       18,690
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Asset-based Lending        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 901 471    
Cumulative effect of ASU 2016-13 adoption (CECL) 857 901 471  
Provision for credit losses (43) 573    
Balance at end of period 857 901 471  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Asset-based Lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       328
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Asset-based Lending | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   0    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Asset-based Lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       (144)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 21,411 11,805    
Cumulative effect of ASU 2016-13 adoption (CECL) 17,601 21,411 11,805  
Provision for credit losses (3,809) 13,399    
Balance at end of period 17,601 21,411 11,805  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       7,950
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   61    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       (3,854)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - owner occupied        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 266 127    
Cumulative effect of ASU 2016-13 adoption (CECL) 208 266 127  
Provision for credit losses (58) 135    
Balance at end of period 208 266 127  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - owner occupied | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       127
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - owner occupied | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   4    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - owner occupied | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       0
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 22,577 12,403    
Cumulative effect of ASU 2016-13 adoption (CECL) 18,667 22,577 12,403  
Provision for credit losses (3,911) 14,108    
Balance at end of period 18,667 22,577 12,403  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       8,405
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   65    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       (3,998)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - investor        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 636 530    
Cumulative effect of ASU 2016-13 adoption (CECL) 936 636 530  
Provision for credit losses 300 (141)    
Balance at end of period 936 636 530  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - investor | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - investor | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   2    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - investor | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       246
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 18,887 7,532    
Cumulative effect of ASU 2016-13 adoption (CECL) 15,586 18,887 7,532  
Provision for credit losses (3,301) (7,038)    
Balance at end of period 15,586 18,887 7,532  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       25,879
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   45    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       18,347
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 19,523 8,062    
Cumulative effect of ASU 2016-13 adoption (CECL) 16,522 19,523 8,062  
Provision for credit losses (3,001) (7,179)    
Balance at end of period 16,522 19,523 8,062  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       26,655
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   47    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       18,593
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 42,101 20,465    
Cumulative effect of ASU 2016-13 adoption (CECL) 35,189 42,101 20,465  
Provision for credit losses (6,912) 6,929    
Balance at end of period 35,189 42,101 20,465  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       35,060
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   112    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       14,595
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 3,118 1,038    
Cumulative effect of ASU 2016-13 adoption (CECL) 2,592 3,118 1,038  
Provision for credit losses (526) (577)    
Balance at end of period 2,592 3,118 1,038  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       3,629
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   66    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       2,591
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer(a)        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 2,557 405    
Cumulative effect of ASU 2016-13 adoption (CECL) 1,995 2,557 405  
Provision for credit losses (563) 649    
Balance at end of period 1,995 2,557 405  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer(a) | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       1,909
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer(a) | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   0    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer(a) | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       1,504
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Balance at beginning of period 5,675 1,443    
Cumulative effect of ASU 2016-13 adoption (CECL) 4,587 5,675 1,443  
Provision for credit losses (1,088) 72    
Balance at end of period 4,587 5,675 1,443  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       5,538
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer | First Staunton Bancshares        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Provision for credit losses   66    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Cumulative effect of ASU 2016-13 adoption (CECL)       4,095
Allowance for Loans Losses and Unfunded Commitments [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff (40,652) (112,053)    
Financing Receivable, Allowance for Credit Loss, Recovery 16,965 11,422    
Net Charge offs (23,687) (100,631)    
Gross up of allowance for PCD loans at acquistion   3,504    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 431,478 223,278    
allowance for credit losses on loans 319,791 431,478 223,278  
Financing Receivable, Allowance for Credit Loss, Recovery 16,965 11,422    
Net Charge offs (23,687) (100,631)    
Gross up of allowance for PCD loans at acquistion   3,504    
Provision for credit losses (88,000) 171,457    
Balance at end of period $ 319,791 $ 431,478 223,278  
Percent of Loans 1.32% 1.76%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       354,425
Allowance for Loans Losses and Unfunded Commitments [Member] | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 2,722    
Allowance for Loans Losses and Unfunded Commitments [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       131,147
Allowance for Loans Losses and Unfunded Commitments [Member] | PPP        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ 0 0    
Financing Receivable, Allowance for Credit Loss, Recovery 0 0    
Net Charge offs 0 0    
Gross up of allowance for PCD loans at acquistion   0    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 531 0    
allowance for credit losses on loans 51 531 0  
Financing Receivable, Allowance for Credit Loss, Recovery 0 0    
Net Charge offs 0 0    
Gross up of allowance for PCD loans at acquistion   0    
Provision for credit losses (480) 531    
Balance at end of period $ 51 $ 531 0  
Percent of Loans 0.08% 0.07%    
Allowance for Loans Losses and Unfunded Commitments [Member] | PPP | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       0
Allowance for Loans Losses and Unfunded Commitments [Member] | PPP | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 0    
Allowance for Loans Losses and Unfunded Commitments [Member] | PPP | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       0
Allowance for Loans Losses and Unfunded Commitments [Member] | Asset-based Lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ 0 (6,650)    
Financing Receivable, Allowance for Credit Loss, Recovery 412 561    
Net Charge offs 412 (6,090)    
Gross up of allowance for PCD loans at acquistion   0    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 2,978 3,878    
allowance for credit losses on loans 5,040 2,978 3,878  
Financing Receivable, Allowance for Credit Loss, Recovery 412 561    
Net Charge offs 412 (6,090)    
Gross up of allowance for PCD loans at acquistion   0    
Provision for credit losses 1,649 5,270    
Balance at end of period $ 5,040 $ 2,978 3,878  
Percent of Loans 2.83% 2.17%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Asset-based Lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       3,798
Allowance for Loans Losses and Unfunded Commitments [Member] | Asset-based Lending | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 0    
Allowance for Loans Losses and Unfunded Commitments [Member] | Asset-based Lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       (80)
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (21,564) (73,670)    
Financing Receivable, Allowance for Credit Loss, Recovery 8,152 6,444    
Net Charge offs (13,412) (67,226)    
Gross up of allowance for PCD loans at acquistion   293    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 162,126 99,531    
allowance for credit losses on loans 103,225 162,126 99,531  
Financing Receivable, Allowance for Credit Loss, Recovery 8,152 6,444    
Net Charge offs (13,412) (67,226)    
Gross up of allowance for PCD loans at acquistion   293    
Provision for credit losses (45,490) 80,058    
Balance at end of period $ 103,225 $ 162,126 99,531  
Percent of Loans 1.26% 2.14%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       148,532
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 469    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       49,001
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - owner occupied        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ 0 (419)    
Financing Receivable, Allowance for Credit Loss, Recovery 120 147    
Net Charge offs 120 (272)    
Gross up of allowance for PCD loans at acquistion   890    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 11,539 10,411    
allowance for credit losses on loans 11,681 11,539 10,411  
Financing Receivable, Allowance for Credit Loss, Recovery 120 147    
Net Charge offs 120 (272)    
Gross up of allowance for PCD loans at acquistion   890    
Provision for credit losses 22 2,102    
Balance at end of period $ 11,681 $ 11,539 10,411  
Percent of Loans 1.20% 1.28%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - owner occupied | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       8,560
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - owner occupied | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 259    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - owner occupied | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       (1,851)
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (21,564) (80,739)    
Financing Receivable, Allowance for Credit Loss, Recovery 8,684 7,151    
Net Charge offs (12,880) (73,588)    
Gross up of allowance for PCD loans at acquistion   1,183    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 177,175 113,820    
allowance for credit losses on loans 119,997 177,175 113,820  
Financing Receivable, Allowance for Credit Loss, Recovery 8,684 7,151    
Net Charge offs (12,880) (73,588)    
Gross up of allowance for PCD loans at acquistion   1,183    
Provision for credit losses (44,299) 87,961    
Balance at end of period $ 119,997 $ 177,175 113,820  
Percent of Loans 1.27% 1.89%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       160,890
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 728    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       47,070
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - investor        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (14,346) (22,920)    
Financing Receivable, Allowance for Credit Loss, Recovery 3,162 643    
Net Charge offs (11,184) (22,277)    
Gross up of allowance for PCD loans at acquistion   753    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 94,071 41,044    
allowance for credit losses on loans 73,739 94,071 41,044  
Financing Receivable, Allowance for Credit Loss, Recovery 3,162 643    
Net Charge offs (11,184) (22,277)    
Gross up of allowance for PCD loans at acquistion   753    
Provision for credit losses (9,148) 71,792    
Balance at end of period $ 73,739 $ 94,071 41,044  
Percent of Loans 1.68% 2.17%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - investor | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       43,331
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - investor | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 474    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - investor | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       2,287
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (5) (19)    
Financing Receivable, Allowance for Credit Loss, Recovery 126 49    
Net Charge offs 121 31    
Gross up of allowance for PCD loans at acquistion   435    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 78,080 32,447    
allowance for credit losses on loans 53,229 78,080 32,447  
Financing Receivable, Allowance for Credit Loss, Recovery 126 49    
Net Charge offs 121 31    
Gross up of allowance for PCD loans at acquistion   435    
Provision for credit losses (24,972) 18,816    
Balance at end of period $ 53,229 $ 78,080 32,447  
Percent of Loans 2.94% 4.24%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       58,261
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 537    
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       25,814
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (14,351) (22,938)    
Financing Receivable, Allowance for Credit Loss, Recovery 3,288 692    
Net Charge offs (11,063) (22,246)    
Gross up of allowance for PCD loans at acquistion   1,188    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 172,152 73,490    
allowance for credit losses on loans 126,968 172,152 73,490  
Financing Receivable, Allowance for Credit Loss, Recovery 3,288 692    
Net Charge offs (11,063) (22,246)    
Gross up of allowance for PCD loans at acquistion   1,188    
Provision for credit losses (34,121) 90,608    
Balance at end of period $ 126,968 $ 172,152 73,490  
Percent of Loans 2.05% 2.78%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       101,591
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 1,011    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       28,101
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (35,915) (103,677)    
Financing Receivable, Allowance for Credit Loss, Recovery 11,972 7,844    
Net Charge offs (23,943) (95,834)    
Gross up of allowance for PCD loans at acquistion   2,371    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 349,327 187,311    
allowance for credit losses on loans 246,965 349,327 187,311  
Financing Receivable, Allowance for Credit Loss, Recovery 11,972 7,844    
Net Charge offs (23,943) (95,834)    
Gross up of allowance for PCD loans at acquistion   2,371    
Provision for credit losses (78,419) 178,569    
Balance at end of period $ 246,965 $ 349,327 187,311  
Percent of Loans 1.58% 2.25%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       262,482
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 1,739    
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       75,171
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (880) (1,867)    
Financing Receivable, Allowance for Credit Loss, Recovery 841 500    
Net Charge offs (38) (1,367)    
Gross up of allowance for PCD loans at acquistion   651    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 42,996 16,960    
allowance for credit losses on loans 40,787 42,996 16,960  
Financing Receivable, Allowance for Credit Loss, Recovery 841 500    
Net Charge offs (38) (1,367)    
Gross up of allowance for PCD loans at acquistion   651    
Provision for credit losses (2,170) (6,864)    
Balance at end of period $ 40,787 $ 42,996 16,960  
Percent of Loans 0.54% 0.55%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       50,175
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 403    
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       33,215
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (668) (1,719)    
Financing Receivable, Allowance for Credit Loss, Recovery 2,854 1,978    
Net Charge offs 2,186 259    
Gross up of allowance for PCD loans at acquistion   422    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 21,967 11,964    
allowance for credit losses on loans 16,603 21,967 11,964  
Financing Receivable, Allowance for Credit Loss, Recovery 2,854 1,978    
Net Charge offs 2,186 259    
Gross up of allowance for PCD loans at acquistion   422    
Provision for credit losses (7,550) (5,358)    
Balance at end of period $ 16,603 $ 21,967 11,964  
Percent of Loans 2.79% 3.11%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       26,204
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 440    
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       14,240
Allowance for Loans Losses and Unfunded Commitments [Member] | Installment and Credit Cards Portfolio Segment, Excluding Auto        
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period $ 17,013      
allowance for credit losses on loans   17,013    
Balance at end of period   17,013    
Allowance for Loans Losses and Unfunded Commitments [Member] | Auto        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff (22)      
Financing Receivable, Allowance for Credit Loss, Recovery 31      
Net Charge offs 9      
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 174      
allowance for credit losses on loans 1,999 174    
Financing Receivable, Allowance for Credit Loss, Recovery 31      
Net Charge offs 9      
Provision for credit losses 1,816      
Balance at end of period $ 1,999 174    
Percent of Loans 1.40%      
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer(a)        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (3,168) (4,790)    
Financing Receivable, Allowance for Credit Loss, Recovery 1,267 1,101    
Net Charge offs (1,901) (3,689)    
Gross up of allowance for PCD loans at acquistion   61    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 17,187 7,044    
allowance for credit losses on loans 13,436 17,187 7,044  
Financing Receivable, Allowance for Credit Loss, Recovery 1,267 1,101    
Net Charge offs (1,901) (3,689)    
Gross up of allowance for PCD loans at acquistion   61    
Provision for credit losses (1,676) 5,111    
Balance at end of period $ 13,436 $ 17,187 7,044  
Percent of Loans 4.45% 5.49%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer(a) | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       15,564
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer(a) | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 140    
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer(a) | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       8,520
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Financing Receivable, Allowance for Credit Loss, Writeoff $ (4,738) (8,376)    
Financing Receivable, Allowance for Credit Loss, Recovery 4,993 3,579    
Net Charge offs 256 (4,797)    
Gross up of allowance for PCD loans at acquistion   1,134    
Allowance for Credit Losses on Loans [Abstract]        
Balance at beginning of period 82,150 35,968    
allowance for credit losses on loans 72,825 82,150 35,968  
Financing Receivable, Allowance for Credit Loss, Recovery 4,993 3,579    
Net Charge offs 256 (4,797)    
Gross up of allowance for PCD loans at acquistion   1,134    
Provision for credit losses (9,581) (7,112)    
Balance at end of period $ 72,825 $ 82,150 $ 35,968  
Percent of Loans 0.85% 0.92%    
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       91,943
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer | First Staunton Bancshares        
Allowance for Credit Losses on Loans [Abstract]        
Provision for credit losses   $ 983    
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans       $ 55,975
Allowance for Loans Losses and Unfunded Commitments [Member] | Oil and Gas Portfolio Segment [Member]        
Allowance for Credit Losses on Loans [Abstract]        
allowance for credit losses on loans $ 6,000      
Balance at end of period $ 6,000      
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and Business Lending (Excluding PPP and Oil & Gas)        
Allowance for Credit Losses on Loans [Abstract]        
Percent of Loans 1.22%