Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 901,312	$ 901,312		$ 901,312	$ 898,569
Purchase accounting adjustments to goodwill	0	2,743
Net intangible assets	$ 62,500	77,363	$ 65,978	69,600
Estimated amortization expense for remainder of fiscal year				14,000
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
Minimum
Goodwill [Line Items]
Weighted average useful life (in years)	6 years
Maximum
Goodwill [Line Items]
Weighted average useful life (in years)	11 years
Core Deposits
Goodwill [Line Items]
Net intangible assets	$ 60,000			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	$ 2,500			$ 2,700
Opus Bank
Goodwill [Line Items]
Purchase accounting adjustments to goodwill		$ 2,700