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Summary of Significant Accounting Policies - Additional Information (Details) | 6 Months Ended | 12 Months Ended |
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Dec. 31, 2021 USD ($) derivativeInstument reportable_segment loan | Jun. 30, 2021 reportable_segment | Dec. 31, 2021 USD ($) derivativeInstument loan | Dec. 31, 2020 USD ($) derivativeInstument | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Outstanding balance of loans in deferral |  |  | $ 31,896,000 | $ 104,597,000 |  |
Accrued interest income and fees on outstanding deferrals |  |  | 124,000 | 726,000 |  |
Misdirected payments | $ 4,867,572,000 |  | 4,867,572,000 | 4,996,776,000 |  |
Accrued interest reversed |  |  | $ 0 | 0 | $ 0 |
Number of days within which accrual of interest income discontinues |  |  | 90 days |  |  |
Period after which consumer loans are charged off |  |  | 120 days |  |  |
Interest income not recognized until loan balance reduced, amount |  |  | $ 0 |  |  |
Net reduction of retained earnings | (858,864,000) |  | (858,864,000) | (726,781,000) | (636,590,000) | $ (636,607,000)
ACL Allocation | 42,213,000 |  | 42,213,000 | 95,739,000 |  |
Allowance for credit loss, debt securities, held to maturity | 2,082,000 |  | 2,082,000 | 2,026,000 | 0 | 0
Deferred tax assets | $ 39,292,000 |  | $ 39,292,000 | 38,361,000 |  |
Equipment loan term |  |  | 60 months |  |  |
Change in national retail sales forecast period |  |  | 1 year |  |  |
Change in national home price index forecast period |  |  | 1 year |  |  |
Change in national gross domestic product forecast period |  |  | 1 year |  |  |
Number of reportable segments | reportable_segment | 4 | 3 |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net reduction of retained earnings |  |  |  |  | 1,770,000 |
ACL Allocation |  |  |  |  | 269,000 |
Allowance for credit loss, debt securities, held to maturity |  |  |  | 0 | 126,000 | 0
Credit loss, liability |  |  |  |  | 1,918,000 |
Deferred tax assets |  |  |  |  | 543,000 |
Retained Earnings |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net reduction of retained earnings | $ (399,351,000) |  | $ (399,351,000) | $ (289,583,000) | (229,030,000) | $ (170,486,000)
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net reduction of retained earnings |  |  |  |  | $ 1,770,000 |
Cash Flow Hedging |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of instruments held | derivativeInstument | 1 |  | 1 | 1 |  |
Fair Value Hedging |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of instruments held | derivativeInstument | 0 |  | 0 | 0 |  |
Automobiles |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 5 years |  |  |
Aircraft |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 20 years |  |  |
Paycheck Protection Program |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Stated interest rate | 1.00% |  | 1.00% |  |  |
Number of loans funded | loan | 118 |  | 118 |  |  |
Misdirected payments | $ 27,197,000 |  | $ 27,197,000 |  |  |
Proceeds and fees received |  |  | 7,263,000 | $ 4,570,000 |  |
Deferred fees on PPP loans | $ 841,000 |  | $ 841,000 |  |  |
Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Nonaccrual status term |  |  | 90 days |  |  |
Estimated useful lives |  |  | 4 years |  |  |
Minimum | Capitalized Software |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful lives |  |  | 3 years |  |  |
Minimum | Buildings |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 5 years |  |  |
Minimum | Furniture, fixtures and equipment |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 3 years |  |  |
Minimum | Paycheck Protection Program |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Loan term |  |  | 2 years |  |  |
Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful lives |  |  | 11 years |  |  |
Maximum | Capitalized Software |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful lives |  |  | 5 years |  |  |
Maximum | Buildings |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 40 years |  |  |
Maximum | Furniture, fixtures and equipment |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 10 years |  |  |
Maximum | Paycheck Protection Program |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Loan term |  |  | 5 years |  |  |
One Customer | Payment Deferral Benchmark | Customer Concentration Risk |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Percentage of loans |  |  | 95.00% |  |  |
Payment Deferrals |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Outstanding balance of loans in deferral |  |  | $ 31,896,000 |  |  |
Accrued interest income and fees on outstanding deferrals |  |  | $ 124,000 |  |  |

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