Loans and Allowance for Credit Losses - Summary of Change in the ACL by Loan Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
ACL, beginning of period	$ 35,893	$ 30,740
(Recovery of) provision for credit losses - loans	(2,900)	24,703
Charge-offs	(28,437)	(31,819)
Recoveries	18,467	4,851
Net (charge-offs) recoveries	(9,970)	(26,968)
ACL, end of period	23,023	35,893
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	13,787	23,073
(Recovery of) provision for credit losses - loans	(1,363)	19,300
Charge-offs	(24,005)	(27,837)
Recoveries	17,348	3,675
Net (charge-offs) recoveries	(6,657)	(24,162)
ACL, end of period	5,767	13,787
Construction, commercial [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	4,024	1,637
(Recovery of) provision for credit losses - loans	(1,982)	21
Charge-offs	0	(36)
Recoveries	15	46
Net (charge-offs) recoveries	15	10
ACL, end of period	2,057	4,024
Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	1,094	628
(Recovery of) provision for credit losses - loans	(515)	(445)
Charge-offs	(39)	0
Recoveries	0	132
Net (charge-offs) recoveries	(39)	132
ACL, end of period	540	1,094
Commercial [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	9,929	2,356
(Recovery of) provision for credit losses - loans	(2,798)	1,440
Charge-offs	(1,238)	0
Recoveries	70	263
Net (charge-offs) recoveries	(1,168)	263
ACL, end of period	5,963	9,929
Residential [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	6,286	1,760
(Recovery of) provision for credit losses - loans	1,734	3,139
Charge-offs	(216)	(1,631)
Recoveries	129	178
Net (charge-offs) recoveries	(87)	(1,453)
ACL, end of period	7,933	6,286
Farmland [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	15	4
(Recovery of) provision for credit losses - loans	3	1
Charge-offs	0	0
Recoveries	0	0
Net (charge-offs) recoveries	0	0
ACL, end of period	18	15
Consumer [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period	758	1,282
(Recovery of) provision for credit losses - loans	2,021	1,247
Charge-offs	(2,939)	(2,315)
Recoveries	905	557
Net (charge-offs) recoveries	(2,034)	(1,758)
ACL, end of period	$ 745	758
Impact of ASC 326 Adoption [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		7,418
Impact of ASC 326 Adoption [Member] \| Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		(4,424)
Impact of ASC 326 Adoption [Member] \| Construction, commercial [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		2,356
Impact of ASC 326 Adoption [Member] \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		779
Impact of ASC 326 Adoption [Member] \| Commercial [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		5,870
Impact of ASC 326 Adoption [Member] \| Residential [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		2,840
Impact of ASC 326 Adoption [Member] \| Farmland [Member] \| Real Estate [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		10
Impact of ASC 326 Adoption [Member] \| Consumer [Member]
Financing Receivable Impaired [Line Items]
ACL, beginning of period		$ (13)

Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss.

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