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v3.20.4

Federal and State Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Deferred tax assets [Abstract] |  |  |
Credit loss reserves | $ 101,265 | $ 50,611 |
Lease liability | 44,794 | 46,084 |
Deferred compensation | 29,504 | 25,976 |
Unearned fees | 14,584 | 9,080 |
Purchased loan discount | 11,537 | 18,042 |
Share-based compensation | 6,525 | 7,392 |
Valuation adjustments | 3,834 | 1,545 |
Other | 29,963 | 26,384 |
Total deferred tax assets | 242,006 | 185,114 |
Valuation Allowance [Abstract] |  |  |
Valuation allowance | 0 | 0 |
Deferred tax liabilities [Abstract] |  |  |
Available for sale securities mark to market | 105,769 | 33,140 |
Right-of-use asset | 38,635 | 42,180 |
Mortgage servicing rights | 24,182 | 48,435 |
Acquired identifiable intangible | 18,138 | 23,181 |
Depreciation | 13,754 | 18,909 |
Lease financing | 11,828 | 10,720 |
Other | 39,210 | 34,826 |
Total deferred tax liabilities | 251,516 | 211,391 |
Deferred Tax Liabilities, Net | (9,510) | (26,277) |
Current income tax expense [Abstract] |  |  |
Federal | 173,888 | 110,887 | $ 103,748
State | 29,889 | 15,088 | 15,253
Total current income tax expense | 203,777 | 125,975 | 119,001
Deferred income tax expense [Abstract] |  |  |
Federal | (65,989) | 3,416 | (190)
State | (8,995) | 792 | 250
Total deferred income tax expense (benefit) | (74,984) | 4,208 | 60
Total income tax expense | 128,793 | 130,183 | 119,061
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Federal statutory tax | 118,412 | 132,482 | 118,752
Tax exempt revenue | (7,035) | (12,227) | (8,311)
Effect of state income taxes, net of federal benefit | 14,251 | 12,715 | 12,430
Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments | (6,994) | (5,127) | (4,559)
Other, net | 10,159 | 2,340 | 749
Total income tax expense | $ 128,793 | $ 130,183 | $ 119,061
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Federal statutory tax (in thousandths) | 21.00% | 21.00% | 21.00%
Tax exempt revenue (in thousandths) | (1.20%) | (1.90%) | (1.50%)
Effect of state income taxes, net of federal benefit (in thousandths) | 2.50% | 2.00% | 2.20%
Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments (in thousandths) | (1.20%) | (0.80%) | (0.80%)
Other, net (in thousandths) | 1.70% | 0.30% | 0.20%
Total (in thousandths) | 22.80% | 20.60% | 21.10%
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance as of January 1 | $ 20,465 | $ 18,869 | $ 18,110
Additions for tax for current year positions | 6,384 | 5,649 | 2,649
Settlements during the period | 0 | 0 | 0
Lapses of applicable statute of limitations | (3,947) | (4,053) | (1,890)
Balance as of December 31 | 22,902 | 20,465 | 18,869
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 17,200 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 2,400 | 2,200 | $ 1,700
Unrecognized Tax Benefits, Penalties and Interest Accrued | $ 5,900 | $ 5,600 |
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, Federal | 3 |  |
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Minimum | 3 |  |
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Maximum | 6 |  |

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