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Additional Cash Flow Information - Additional Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Significant Noncash Transactions [Line Items] |  |  |
Interest paid | $ 123,995 | $ 182,541 | $ 122,801
Income taxes paid | 47,777 | 51,999 | 25,718
Transfers of premises to premises held for sale | 11,200 | 0 | 0
Transfers of other real estate owned to premises held for sale | 4,163 | 0 | 0
Right-of-use lease assets obtained in exchange for lessee operating lease liabilities (adoption of ASU 2016-02) | 0 | 32,757 |
Transfers of held-to-maturity to available-for-sale securities | 0 | 216,373 | 0
Transfers of loans to other assets held for sale | 114,925 | 259,939 | 0
Transfers of deposits to other liabilities held for sale | 213,025 | 159,853 | 0
Transfers of loans to foreclosed assets held for sale |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |
Real estate transferred | 10,712 | 4,760 | 16,858
Transfers of premises to foreclosed assets and other real estate owned |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |
Real estate transferred | $ 3,120 | $ 647 | $ 3,690

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