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Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Loan commitments	$ 4,489,000,000	$ 3,720,000,000
Standby letters of credit	75,700,000	86,900,000
Fixed rate loan commitment	4,151,000,000
Floating rate loan commitment	$ 338,200,000
Loan commitments floating rate, minimum	0.00%
Loan commitments floating rate, maximum	14.00%
Allowance for unfunded loan commitments	$ 10,900,000	11,700,000
Extended credit	21,800,000	7,900,000
Credit extensions with collateral	$ 6,500,000	$ 7,500,000
Class B Restricted Shares | Visa
Loss Contingencies [Line Items]
Restricted stock conversion ratio	1.6181
Investment owned, balance (in shares) | shares	65,466
Investment owned, at cost	$ 0

X

- Definition

Amount of valuation allowance recorded for unfunded commitments to extend credit.

+ References

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X

- Definition

Amount of credit extended with unaffiliated banks related to letter of credit commitments issued on behalf of our clients.

+ References

No definition available.

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- Definition

Amount of collateral provided to secure credit extended with unaffiliated banks related to letter of credit commitments issued on behalf of our clients.

+ References

No definition available.

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- Definition

Amount of agreement to extend credit in the form of a loan.

+ References

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- Definition

Maximum floating rate percentage charged on loan commitments.

+ References

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- Definition

Minimum floating rate percentage charged on loan commitments.

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- Definition

Amount of agreement to extend credit in the form of a standby letter of credit.

+ References

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- Definition

Restricted stock conversion ratio.

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- Definition

Cost of the investment.

+ References

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-Section 50
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- Definition

Balance held at close of period in number of shares.

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

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Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at interest rates that increase or decrease depending on certain facts or circumstances.

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