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Fair Value of Assets and Liabilities - Schedule of Carrying Amount, Fair Value, and Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | $ 4,104,469 | $ 4,615,393
Carrying Amount |  |
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | 5,088,013 | 5,414,139
Loans | 13,651,759 | 13,371,226
Financial Instruments - Liabilities |  |
Time Deposits | 2,659,014 | 1,705,737
Securities Sold Under Agreements to Repurchase | 150,490 | 725,490
Other Debt | 550,000 | 400,000
Fair Value |  |
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | 4,104,469 | 4,615,393
Loans | 12,416,800 | 12,386,615
Financial Instruments - Liabilities |  |
Time Deposits | 2,627,361 | 1,679,777
Securities Sold Under Agreements to Repurchase | 151,963 | 718,614
Other Debt | 538,987 | 402,877
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Fair Value |  |
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | 111,409 | 113,417
Loans | 0 | 0
Financial Instruments - Liabilities |  |
Time Deposits | 0 | 0
Securities Sold Under Agreements to Repurchase | 0 | 0
Other Debt | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value |  |
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | 3,993,060 | 4,501,976
Loans | 0 | 0
Financial Instruments - Liabilities |  |
Time Deposits | 2,627,361 | 1,679,777
Securities Sold Under Agreements to Repurchase | 151,963 | 718,614
Other Debt | 538,987 | 402,877
Significant Other Unobservable Inputs (Level 3) | Fair Value |  |
Financial Instruments - Assets |  |
Held-to-Maturity: Fair Value | 0 | 0
Loans | 12,416,800 | 12,386,615
Financial Instruments - Liabilities |  |
Time Deposits | 0 | 0
Securities Sold Under Agreements to Repurchase | $ 0 | 0
Other Debt |  | $ 0

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