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Fair Value - Changes in Fair Value for Items Measured at Fair Value Pursuant to Election of the Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Interest Income | $ 151,572 | $ 145,573 | $ 449,619 | $ 435,015
Interest (Expense) | (10,454) | (14,513) | (32,102) | (55,044)
Residential loans held for sale |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Other Gains and (Losses) | (453) | (1,360) | (2,043) | 3,658
Interest Income | 0 | 16 | 2 | 18
Interest (Expense) | (2) | 0 | (3) | (2)
Total Changes in Fair Values Included in Current Period Earnings | $ (455) | $ (1,344) | $ (2,044) | $ 3,674

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