Goodwill and Other Intangible Assets - Textual (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,309,000,000		$ 1,309,000,000	$ 1,146,007,000
Goodwill increase			$ 163,000,000
Goodwill impairment	$ 0	$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			8 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			15 years
Core Deposit Premium | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			10 years
Core Deposit Premium | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			15 years