Outstanding Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Credit Commitments and Contingencies
Total commitments	$ 2,016,207	$ 1,793,307
Commitments to extend credit
Credit Commitments and Contingencies
Total commitments	1,983,655	1,754,370
Standby letters of credit
Credit Commitments and Contingencies
Total commitments	$ 32,552	$ 38,937