Deposits - Narrative (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Statistical Disclosure for Banks [Abstract]
Time deposits with a denomination of $250,000 or more	$ 1,400	$ 593
California | Deposits | Geographic Concentration Risk
Deposit Liability [Line Items]
Concentration risk, percentage	39.50%
North Carolina | Deposits | Geographic Concentration Risk
Deposit Liability [Line Items]
Concentration risk, percentage	30.20%	50.80%
South Carolina | Deposits | Geographic Concentration Risk
Deposit Liability [Line Items]
Concentration risk, percentage	13.40%	22.70%