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Goodwill and Core Deposit Intangibles - Goodwill and Core Deposit Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill, Beginning balance			$ 3,396,086	$ 3,231,636	$ 3,231,636
Goodwill, Ending balance	$ 3,504,107		3,504,107		3,396,086
Core Deposit Intangibles, Beginning balance			63,994	51,348	51,348
Core Deposit Intangibles, Amortization	(4,156)	$ (3,167)	(7,393)	$ (5,541)	(12,676)
Core Deposit Intangibles, Ending balance	74,324		74,324		63,994
First Bancshares Merger [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Bancshares Merger			316		164,450
Goodwill, Ending balance	164,800		164,800
Core Deposit Intangibles, Bancshares Merger					$ 25,322
Lone Star State Bancshares Merger [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Bancshares Merger			107,705
Goodwill, Ending balance	107,700		107,700
Core Deposit Intangibles, Bancshares Merger			17,723
Core Deposit Intangibles, Ending balance	$ 17,700		$ 17,700

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