Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 901,312	$ 901,312	$ 898,569
Purchase accounting adjustments	0	2,743
Net intangible assets	55,588	69,571	$ 85,507
Estimated amortization expense for 2023	12,300
Estimated amortization expense for 2024	11,100
Estimated amortization expense for 2025	10,000
Estimated amortization expense for 2026	8,900
Estimated amortization expense for 2027	7,200
Core Deposits
Goodwill [Line Items]
Net intangible assets	$ 53,200	66,900
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	$ 2,400	2,700
Opus
Goodwill [Line Items]
Purchase accounting adjustments		$ 2,700