Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 991,665	$ 991,708
Sale of the insurance agency	(2,767)
Ending balance	988,898	991,665
Continental Republic Capital Acquisition
Goodwill [Roll Forward]
Measurement period adjustments to goodwill from the Continental Republic Capital, LLC acquisition		(43)
Community Banks
Goodwill [Roll Forward]
Beginning balance	988,898	988,941
Sale of the insurance agency	0
Ending balance	988,898	988,898
Community Banks | Continental Republic Capital Acquisition
Goodwill [Roll Forward]
Measurement period adjustments to goodwill from the Continental Republic Capital, LLC acquisition		(43)
Insurance
Goodwill [Roll Forward]
Beginning balance	2,767	2,767
Sale of the insurance agency	(2,767)
Ending balance	$ 0	2,767
Insurance | Continental Republic Capital Acquisition
Goodwill [Roll Forward]
Measurement period adjustments to goodwill from the Continental Republic Capital, LLC acquisition		$ 0