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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
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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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