Goodwill and Other Acquisition-Related Intangible Assets - Schedule of Goodwill Assets by Reporting Unit (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 653,524
Goodwill Acquired	2,622
Impairment Loss	0
Goodwill Adjustments	(37)
Ending balance	656,109
Community banking
Goodwill [Roll Forward]
Beginning balance	545,671
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	545,671
Specialty finance
Goodwill [Roll Forward]
Beginning balance	38,480
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(37)
Ending balance	38,443
Wealth management
Goodwill [Roll Forward]
Beginning balance	69,373
Goodwill Acquired	2,622
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 71,995