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Goodwill and Other Intangible Assets - Summary of Core Deposit Intangibles (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Core Deposit Intangibles [Roll Forward]
Core deposit intangibles, beginning balance	$ 38,826
Fully amortized portion	(2,046)	$ (8,074)
Acquisition of VRB	0	10,635
Core deposit intangibles, ending balance	36,780	38,826
Accumulated Amortization, Core Deposit Intangibles [Roll Forward]
Accumulated amortization, gross	(22,156)	(23,896)
Fully amortized portion	2,046	8,074
Amortization expense	(6,118)	(6,334)
Accumulated amortization, gross ending balance	(26,228)	(22,156)
Core deposit intangibles
Core Deposit Intangibles [Roll Forward]
Core deposit intangibles, beginning balance	38,826	36,265
Core deposit intangibles, ending balance		38,826
Accumulated Amortization, Core Deposit Intangibles [Roll Forward]
Core deposit intangibles, net, ending balance	$ 10,552	$ 16,670

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- Definition

Accumulated Amortization, Core Deposit Intangibles

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Core deposit intangibles additions.

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- Definition

Core deposit intangibles reductions.

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Core Deposit Intangibles

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Finite lived intangible assets accumulated amortization addition.

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Finite lived intangible assets accumulated amortization reductions.

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- Definition

Bank deposits belonging to an acquired bank that can be counted on as a stable source of lending funds. These deposits have the following attributes: predictable costs and low sensitivity to interest rates. This intangible asset is usually amortized over its estimated useful life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
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