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Parent Company Only Financial Statements Parent Company Only Financial Statements, Condensed Balance Sheet Statement (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Assets [Abstract] |  |  |  |
Loan to bank subsidiary | $ 23,627,845 | $ 22,321,446 |  |
Other assets | 1,070,282 | 1,354,379 |  |
Total assets | 49,824,830 | 47,790,642 |  |
Liabilities [Abstract] |  |  |  |
Other liabilities | 523,734 | 484,849 |  |
Subordinated debentures | 131,150 | 131,205 |  |
Total liabilities | 44,679,411 | 43,103,284 |  |
Shareholders' equity: [Abstract] |  |  |  |
Common stock | 5 | 5 |  |
Capital surplus | 1,406,745 | 1,390,395 |  |
Retained earnings | 5,211,512 | 4,824,164 |  |
Treasury Stock, Value | (876,720) | (694,960) |  |
Accumulated other comprehensive income (loss) | (599,100) | (836,955) | $ 72,371 | $ 335,868
Total shareholders’ equity | 5,142,442 | 4,682,649 |  |
Total liabilities and shareholders’ equity | 49,824,830 | 47,790,642 |  |
Parent Company [Member] |  |  |  |
Assets [Abstract] |  |  |  |
Cash and cash equivalents | 203,808 | 165,395 |  |
Loan to bank subsidiary | 65,151 | 65,169 |  |
Investment in bank subsidiary | 4,785,453 | 4,351,280 |  |
Investment in non-bank subsidiaries | 216,200 | 217,011 |  |
Other assets | 17,984 | 18,302 |  |
Total assets | 5,288,596 | 4,817,157 |  |
Liabilities [Abstract] |  |  |  |
Other liabilities | 15,004 | 3,303 |  |
Subordinated debentures | 131,150 | 131,205 |  |
Total liabilities | 146,154 | 134,508 |  |
Shareholders' equity: [Abstract] |  |  |  |
Common stock | 5 | 5 |  |
Capital surplus | 1,406,745 | 1,390,395 |  |
Retained earnings | 5,211,512 | 4,824,164 |  |
Treasury Stock, Value | (876,720) | (694,960) |  |
Accumulated other comprehensive income (loss) | (599,100) | (836,955) |  |
Total shareholders’ equity | 5,142,442 | 4,682,649 |  |
Total liabilities and shareholders’ equity | $ 5,288,596 | $ 4,817,157 |  |

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