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Additional Cash Flow Information - Additional Information (Detail) - Happy Bancshares, Inc. - USD ($) $ in Thousands, shares in Millions	Apr. 01, 2022	Jun. 30, 2022
Supplemental Cash Flow Information [Line Items]
Business combination, recognized identifiable assets acquired	$ 6,755,152	$ 6,687,504
Business combination, Cash and cash equivalents	859,030	858,584
Business combination, liabilities	6,139,373	$ 6,150,194
Business combination consideration paid	$ 962,538
Common Stock
Supplemental Cash Flow Information [Line Items]
Business acquisition, equity interest issuable, number of shares (in shares)	42.4
Business acquisition, equity interest issuable, value	$ 958,800
Business combination consideration paid	962,500
Stock-based Awards
Supplemental Cash Flow Information [Line Items]
Business acquisition, equity interest issuable, value	$ 3,700

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Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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