Outstanding Commitments and Contingent Liabilities - Schedule of contractual amount of exposure to off-balance-sheet risk (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Credit Commitments and Contingencies
Total commitments	$ 2,056,188	$ 2,016,207
Commitments to extend credit
Credit Commitments and Contingencies
Total commitments	2,024,255	1,983,655
Standby letters of credit
Credit Commitments and Contingencies
Total commitments	$ 31,933	$ 32,552