Loans - Nonaccrual loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	$ 120,970	$ 104,225
Greater than 90 Days Accruing	3,650
Non-accrual with no allowance	34,126
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	306	827
Non-accrual with no allowance	8
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	21,758	20,425
Non-accrual with no allowance	11,338
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	35,563	35,089
Greater than 90 Days Accruing	1,665
Non-accrual with no allowance	15,034
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	29,953	17,129
Greater than 90 Days Accruing	1,837
Non-accrual with no allowance	6,252
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	2,991	2,734
Greater than 90 Days Accruing	147
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	19,381	17,307
Non-accrual with no allowance	5
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	5,736	6,316
Non-accrual with no allowance	1,489
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	5,282	$ 4,398
Greater than 90 Days Accruing	$ 1