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Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
The following table illustrates the impact on the allowance for credit losses from the adoption of ASU 2016-13:
(Dollars in thousands)As Reported Under ASC 326 January 1, 2020Pre-ASC 326 Adoption December 31, 2019Impact of ASC 326 Adoption
Assets:



Loans, at amortized cost$2,876,147  $2,873,525  $2,622  
Allowance for credit losses on loans:
  Construction651  1,188  (537) 
  Commercial real estate, other8,549  6,560  1,989  
  Commercial and industrial5,820  8,568  (2,748) 
  Residential real estate4,360  1,296  3,064  
  Home equity lines of credit1,572  612  960  
  Consumer, indirect5,389  2,942  2,447  
  Consumer, direct890  296  594  
  Deposit account overdrafts94  94  —  
Allowance for credit losses on loans27,325  21,556  5,769  




Liabilities:



Allowance for credit losses for unfunded commitments$1,495  $—  $1,495