Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 901,312,000	$ 901,312,000
Goodwill adjustments during period	0	0
Net intangible assets	32,194,000	43,285,000	$ 55,588,000
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
Estimated amortization expense for 2029	1,500,000
Core Deposits
Goodwill [Line Items]
Net intangible assets	$ 30,500,000	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	$ 1,700,000	$ 2,100,000