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Goodwill and Other Intangible Assets - Carrying Amounts of Goodwill by Operating Segments (Details) - USD ($) $ in Thousands		3 Months Ended
	Apr. 01, 2025	Mar. 31, 2026
Goodwill [Roll Forward]
Balance at December 31, 2025	$ 988,898	$ 1,405,840
Additions to goodwill from The First merger		827
Balance at March 31, 2026		1,406,667
Community Banks
Goodwill [Roll Forward]
Balance at December 31, 2025		1,405,840
Additions to goodwill from The First merger		827
Balance at March 31, 2026		$ 1,406,667

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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- Definition

Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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