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Goodwill and Core Deposits and Other Intangibles - Summary of Carrying Amount and Accumulated Amortization of Core Deposits and Other Intangibles (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying basis	$ 128,888	$ 128,888
Accumulated amortization	(84,398)	(80,118)
Net carrying amount	$ 44,490	$ 48,770	$ 53,500	$ 58,455

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- Definition

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

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

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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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