Mergers and Acquisitions- Summary of Supplemental Pro Forma Information Adjustments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) location	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) location	Sep. 30, 2021 USD ($)
Business Acquisition [Line Items]
Locations closing under consolidation plan | location	14		14
Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 25,536	$ 9,847	$ 200,671	$ 26,894
Approximate reduction in real estate	45.00%		45.00%
Compensation and benefits | Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 5,770	7,731	$ 71,472	8,197
Occupancy | Sterling
Business Acquisition [Line Items]
Merger-related expenses	4,389	0	35,744	0
Occupancy | Sterling | Right Of Use Assets
Business Acquisition [Line Items]
Merger-related expenses	23,100
Technology and equipment | Sterling
Business Acquisition [Line Items]
Merger-related expenses	1,478	33	21,375	33
Professional and outside services | Sterling
Business Acquisition [Line Items]
Merger-related expenses	10,792	2,028	59,073	18,315
Marketing | Sterling
Business Acquisition [Line Items]
Merger-related expenses	64	0	199	0
Other expense | Sterling
Business Acquisition [Line Items]
Merger-related expenses	$ 3,043	$ 55	$ 12,808	$ 349