Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Portfolio loans, net - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for Loan Losses [Roll Forward]
Beginning Balance	$ 139,212	$ 131,527	$ 145,041	$ 136,671
Provision (benefit) for credit losses	1,159	(2,473)	(3,149)	(1,970)
Charge-offs	(828)	(1,832)	(4,140)	(8,306)
Recoveries	1,003	963	2,794	1,790
Ending Balance	140,546	128,185	140,546	128,185
Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Beginning Balance	60,975	55,941	63,825	58,812
Provision (benefit) for credit losses	4,562	(1,839)	3,081	(1,298)
Charge-offs	(97)	(1,451)	(2,256)	(5,190)
Recoveries	206	700	996	1,027
Ending Balance	65,646	53,351	65,646	53,351
CRE - investor owned
Allowance for Loan Losses [Roll Forward]
Beginning Balance	36,194	33,105	35,877	32,062
Provision (benefit) for credit losses	(2,680)	2,859	(2,559)	6,240
Charge-offs	(200)	0	(200)	(2,372)
Recoveries	24	39	220	73
Ending Balance	33,338	36,003	33,338	36,003
CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Beginning Balance	17,038	20,219	17,560	17,012
Provision (benefit) for credit losses	(1,066)	(4,449)	(1,648)	(1,223)
Charge-offs	(25)	(216)	(205)	(244)
Recoveries	209	10	449	19
Ending Balance	16,156	15,564	16,156	15,564
Construction and land development
Allowance for Loan Losses [Roll Forward]
Beginning Balance	12,983	14,557	14,536	21,413
Provision (benefit) for credit losses	183	(2,957)	(1,391)	(10,048)
Charge-offs	0	0	0	0
Recoveries	14	32	35	267
Ending Balance	13,180	11,632	13,180	11,632
Residential real estate
Allowance for Loan Losses [Roll Forward]
Beginning Balance	7,109	4,305	7,927	4,585
Provision (benefit) for credit losses	307	255	(149)	103
Charge-offs	(418)	(44)	(1,305)	(315)
Recoveries	480	161	1,005	304
Ending Balance	7,478	4,677	7,478	4,677
Other
Allowance for Loan Losses [Roll Forward]
Beginning Balance	4,913	3,400	5,316	2,787
Provision (benefit) for credit losses	(147)	3,658	(483)	4,256
Charge-offs	(88)	(121)	(174)	(185)
Recoveries	70	21	89	100
Ending Balance	$ 4,748	$ 6,958	$ 4,748	$ 6,958