Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Commitments and letters of credit	$ 2,727,653	$ 2,777,942
Commitments to extend credit
Other Commitments [Line Items]
Commitments and letters of credit	2,661,977	2,713,586
Standby letters of credit
Other Commitments [Line Items]
Commitments and letters of credit	$ 65,676	$ 64,356