Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill	$ 901,312,000		$ 901,312,000	$ 901,312,000
Goodwill adjustments during period	0	$ 0
Net intangible assets	37,686,000	$ 49,362,000	37,686,000	43,300,000
Estimated amortization expense for 2024				11,100,000
Estimated amortization expense for 2025				10,000,000.0
Estimated amortization expense for 2026				8,900,000
Estimated amortization expense for 2027				7,200,000
Estimated amortization expense for 2028				4,000,000.0
Core Deposits
Goodwill [Line Items]
Net intangible assets	35,800,000		$ 35,800,000	41,200,000
Core Deposits | Minimum
Goodwill [Line Items]
Weighted average useful life (in years)			6 years
Core Deposits | Maximum
Goodwill [Line Items]
Weighted average useful life (in years)			11 years
Customer Relationships
Goodwill [Line Items]
Net intangible assets	$ 1,900,000		$ 1,900,000	$ 2,100,000