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Income Taxes (Reconciliation of Expected Income Tax Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2018 | Feb. 28, 2018 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2018 | Nov. 30, 2018
Increase (decrease) resulting from |  |  |  |  |  |  |
Income tax benefit computed at statutory rate |  |  | $ (76,449) | $ (73,117) | $ (81,689) |  |
Income tax benefit computed at statutory rate (percent) |  |  | (21.00%) | (21.00%) |  | (22.20%) | (22.00%)
Tax credits |  |  | $ 18,734 | $ 6,595 | 14,177 |  |
Tax Credit (percent) |  |  | 5.10% | 1.90% |  | 3.90% |
Depreciation and amortization |  |  | $ 9,910 | $ 4,276 | 1,223 |  |
Depreciation and amortization (Percent) |  |  | 2.70% | 1.20% |  | 0.30% |
Valuation allowance for deferred tax assets |  |  | $ 1,200 | $ 4,400 | 2,000 |  |
Valuation allowance for deferred tax assets (percent) |  |  | 0.30% | 1.30% |  | 0.50% |
Non-deductible compensation |  |  | $ (4,812) | $ (4,653) | 0 |  |
Non-deductible compensation (percent) |  |  | (1.30%) | (1.30%) |  | 0.00% |
State taxes, net of federal income tax benefit |  |  | $ (16,395) | $ (20,927) | (20,155) |  |
State taxes, net of federal income tax benefit (percent) |  |  | (4.40%) | (6.00%) |  | (5.50%) |
NOL reconciliation |  |  | $ 0 | $ 3,111 | 0 |  |
NOL reconciliation (percent) |  |  | 0.00% | 0.90% |  | 0.00% |
TCJA adjustment | $ 1,300 | $ 111,200 | $ 0 | $ 0 | 112,458 |  |
TCJA adjustment (percent) |  |  | 0 | 0 |  | (0.305) |
Other, net |  |  | $ 12 | $ 915 | (698) |  |
Other, net (percent) |  |  | 0.00% | 0.20% |  | (0.20%) |
Income tax expense |  |  | $ (67,800) | $ (79,400) | (197,600) |  |
Income tax expense (percent) |  |  | (18.60%) | (22.80%) |  | (53.70%) |
Reconciliation of the beginning and ending balances of the gross unrecognized benefits |  |  |  |  |  |  |
Balance at beginning of year |  | $ 56 | $ 0 | $ 0 | 56 |  |
Reductions due to lapse of statute of limitations |  |  | 0 | 0 | (56) |  |
Balance at the end of year | $ 0 |  | $ 0 | $ 0 | $ 0 |  |

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