Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Portfolio loans, net - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Allowance for Loan Losses [Roll Forward]
Beginning Balance	$ 145,041	$ 136,671
Provision for credit losses	4,308	(503)
Charge-offs	(3,312)	(6,474)
Recoveries	1,791	827
Ending Balance	139,212	131,527
Commercial and industrial
Allowance for Loan Losses [Roll Forward]
Beginning Balance	63,825	58,812
Provision for credit losses	1,481	(541)
Charge-offs	(2,159)	(3,739)
Recoveries	790	327
Ending Balance	60,975	55,941
CRE - investor owned
Allowance for Loan Losses [Roll Forward]
Beginning Balance	35,877	32,062
Provision for credit losses	(121)	(3,381)
Charge-offs	0	(2,372)
Recoveries	196	34
Ending Balance	36,194	33,105
CRE - owner occupied
Allowance for Loan Losses [Roll Forward]
Beginning Balance	17,560	17,012
Provision for credit losses	582	(3,226)
Charge-offs	(180)	(28)
Recoveries	240	9
Ending Balance	17,038	20,219
Construction and land development
Allowance for Loan Losses [Roll Forward]
Beginning Balance	14,536	21,413
Provision for credit losses	1,574	7,091
Charge-offs	0	0
Recoveries	21	235
Ending Balance	12,983	14,557
Residential real estate
Allowance for Loan Losses [Roll Forward]
Beginning Balance	7,927	4,585
Provision for credit losses	456	152
Charge-offs	(887)	(271)
Recoveries	525	143
Ending Balance	7,109	4,305
Other
Allowance for Loan Losses [Roll Forward]
Beginning Balance	5,316	2,787
Provision for credit losses	336	(598)
Charge-offs	(86)	(64)
Recoveries	19	79
Ending Balance	$ 4,913	$ 3,400