Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Investment securities:
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 1,900,000	$ 0
Estimated fair value	$ 3,063,500,000	$ 1,667,500,000
Stockholders' equity:
Nonvoting, noncumulative preferred stock, shares authorized (in shares)	100,000	100,000
Nonvoting, noncumulative preferred stock, shares issued (in shares)	0	0
Nonvoting, noncumulative preferred stock, shares outstanding (in shares)	0	0
Preferred Stock, Shares Outstanding	0	0
Shares outstanding (in shares)	104,450,804	62,200,456
Common Stock, Shares, Issued	104,450,804	62,200,456
Common Stock, Shares Authorized	150,000,000	100,000,000
Common Stock, Par or Stated Value Per Share	$ 0	$ 0
Preferred Stock, No Par Value	$ 0	$ 0
Other Short-term Borrowings	$ 625,000,000	$ 0
Class A Common Stock
Stockholders' equity:
Shares outstanding (in shares)		41,699,409