Loans and ACL - Summary of Change in the ACL by Major Loan Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Financing Receivable Impaired [Line Items]
Balance, beginning of period	$ 29,974	$ 12,013	$ 22,939	[1]	$ 12,121
Charge-offs	(9,020)	(2,791)	(10,329)		(5,567)
Recoveries	1,013	526			694
Net charge-offs	(8,007)	(2,265)	(9,094)		(4,873)
Provision for loan losses	21,100	7,494	25,200		9,994
Balance, end of period	43,067	17,242	43,067		17,242
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Balance, beginning of period	21,279		19,269
Charge-offs	(7,326)	(1,383)	(8,095)		(3,746)
Recoveries	887	2			37
Net charge-offs	(6,439)		(7,120)
Provision for loan losses	19,524		22,685
Balance, end of period	34,364		34,364
Real estate construction [Member]
Financing Receivable Impaired [Line Items]
Charge-offs					(123)
Recoveries		4			16
Real Estate Mortgage [Member]
Financing Receivable Impaired [Line Items]
Charge-offs		(1,079)			(1,093)
Recoveries		387			391
Consumer [Member]
Financing Receivable Impaired [Line Items]
Balance, beginning of period	8,695		3,670
Charge-offs	(1,694)	(329)	(950)		(605)
Recoveries	126	$ 133			$ 250
Net charge-offs	(1,568)		(1,974)
Provision for loan losses	1,576		2,515
Balance, end of period	8,703		8,703
Impact of ASC 326 Adoption [Member]
Financing Receivable Impaired [Line Items]
Balance, beginning of period			4,022
Impact of ASC 326 adoption	4,022		4,022
Charge-offs			10,329
Recoveries			1,235
Impact of ASC 326 Adoption [Member] | Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Impact of ASC 326 adoption	(470)		(470)
Charge-offs			8,125
Recoveries			1,005
Impact of ASC 326 Adoption [Member] | Consumer [Member]
Financing Receivable Impaired [Line Items]
Impact of ASC 326 adoption	$ 4,492		4,492
Charge-offs			2,204
Recoveries			$ 230

[1] Derived from audited December 31, 2022 Consolidated Financial Statements.