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Basis of Presentation and Significant Accounting Policies - Summary of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash payments: |  |  |
Interest | $ 70,043 | $ 127,713 | $ 91,813
Income taxes (net of refunds) | 24,436 | 5,494 | (2,505)
Noncash Investing and Financing Activities: |  |  |
Securities transferred from held-to-maturity to available-for-sale | 0 | 381,992 | 447,026
Securities transferred from available-for-sale to held-to-maturity | 0 | 0 | 323,990
Transfer of premises and equipment to assets held for sale | 16,661 | 2,689 | 9,634
Operating lease right-of-use assets obtained in exchange for lease obligations | (116) |  |
Operating lease right-of-use assets obtained in exchange for lease obligations |  | 113,498 | 0
Finance lease right-of-use assets obtained in exchange for lease obligations | $ 5,225 | $ 7,871 | $ 0

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