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v3.19.3.a.u2

Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cash on hand or on deposit required | $ 918,000 | $ 447,900 |  |
Cash collateral on deposit | 37,500 | 10,000 |  |
Foreclosed assets | 1,100 | 1,200 |  |
Operating lease, right-of-use asset | 297,736 | 0 |  | $ 170,500
Operating lease, liability |  |  |  | $ 174,400
Cumulative effect of new accounting principle in period of adoption |  | (14,672) | $ (2,285) |
Additional premium amortization expense on securities | 5,200 |  |  |
Gross interchange and debit card transaction fees | 27,800 | 25,800 | 23,200 |
Gross cost related to interchange and debit card transactions | 12,900 | 11,900 | 11,900 |
Interchange and debit card transaction fees | $ 14,873 | 13,877 | 23,232 |
Minimum [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Range of change in fair value of derivative hedging instrument to be considered highly effective | 80.00% |  |  |
Maximum [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Range of change in fair value of derivative hedging instrument to be considered highly effective | 125.00% |  |  |
Retained Earnings [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  | (14,672) | $ (2,285) |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification of certain income tax effects related to U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act |  | $ 9,500 |  |

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