Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Portfolio loans, net - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Allowance for Loan Losses [Roll Forward]
Beginning Balance	$ 136,932	$ 145,041
Provision (benefit) for credit losses	(1,099)	4,308
Charge-offs	(1,180)	(3,312)
Recoveries	1,444	1,791
Ending Balance	138,295	139,212
Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Beginning Balance	53,835	63,825
Provision (benefit) for credit losses	(5,083)	1,481
Charge-offs	(707)	(2,159)
Recoveries	938	790
Ending Balance	59,149	60,975
CRE - investor owned
Allowance for Loan Losses [Roll Forward]
Beginning Balance	36,191	35,877
Provision (benefit) for credit losses	(222)	(121)
Charge-offs	(170)	0
Recoveries	23	196
Ending Balance	36,266	36,194
CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Beginning Balance	22,752	17,560
Provision (benefit) for credit losses	440	582
Charge-offs	0	(180)
Recoveries	16	240
Ending Balance	22,328	17,038
Construction and land development
Allowance for Loan Losses [Roll Forward]
Beginning Balance	11,444	14,536
Provision (benefit) for credit losses	2,578	1,574
Charge-offs	(9)	0
Recoveries	32	21
Ending Balance	8,889	12,983
Residential real estate
Allowance for Loan Losses [Roll Forward]
Beginning Balance	7,928	7,927
Provision (benefit) for credit losses	1,151	456
Charge-offs	(102)	(887)
Recoveries	322	525
Ending Balance	6,997	7,109
Other
Allowance for Loan Losses [Roll Forward]
Beginning Balance	4,782	5,316
Provision (benefit) for credit losses	37	336
Charge-offs	(192)	(86)
Recoveries	113	19
Ending Balance	$ 4,666	$ 4,913