Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Goodwill [Line Items]
Goodwill, beginning balance	$ 172,559
Goodwill, acquired during period	0
Goodwill, ending balance	172,559
Wealth Management [Member]
Goodwill [Line Items]
Goodwill, beginning balance	15,434
Goodwill, acquired during period	0
Goodwill, ending balance	15,434
Insurance [Member]
Goodwill [Line Items]
Goodwill, beginning balance	18,649
Goodwill, acquired during period	0
Goodwill, ending balance	18,649
Banking1
Goodwill [Line Items]
Goodwill, beginning balance	138,476
Goodwill, acquired during period	0
Goodwill, ending balance	$ 138,476