Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Commitment And Contingencies [Line Items]
Total Commitments	$ 2,671,292	$ 2,274,847
Standby letters of credit
Commitment And Contingencies [Line Items]
Total Commitments	87,335	89,095
Commitments to extend credit
Commitment And Contingencies [Line Items]
Total Commitments	$ 2,583,957	$ 2,185,752