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Nature of Operations and Summary of Significant Accounting Policies - Impact Of Covid-19 (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Apr. 01, 2022 | Dec. 31, 2021 | Apr. 01, 2021
--- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loans | $ 12,003,894 |  | $ 9,241,861 |
PPP, CARES Act |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loans | $ 4,700 |  | $ 106,600 |
Level One |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loans at acquisition |  | $ 1,627,423 |  | $ 1,600,000
Level One | PPP, CARES Act |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loans at acquisition |  |  |  | $ 43,500

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