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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 | Nov. 30, 2018 | Nov. 30, 2018 | Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016
Income tax benefit computed at the statutory U.S. federal income tax rate and income tax benefit (expense) provided in the consolidated statements of operations |  |  |  |  |  |
Income tax benefit computed at statutory rate |  |  | $ (81,689) |  | $ (101,499) | $ (52,260)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | (22.20%) |  | (22.00%) | (35.00%) | (35.00%)
Increase (decrease) resulting from |  |  |  |  |  |
Tax credits |  |  | 14,177 |  | $ 6,227 | $ 4,447
Effective Income Tax Rate Reconciliation, Tax Credit, Percent |  | 3.90% |  |  | 2.20% | 3.00%
Valuation allowance for deferred tax assets |  |  | 2,000 |  | $ 1,200 | $ 12,982
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent |  | 0.50% |  |  | 0.40% | 8.70%
Depreciation and amortization |  |  | 1,223 |  | $ 362 | $ 1,842
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Percent |  | 0.30% |  |  | 0.10% | 1.20%
State taxes, net of federal income tax benefit |  |  | (20,155) |  | $ (14,450) | $ (7,511)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  | (5.50%) |  |  | (4.90%) | (5.00%)
TCJA adjustment | $ 1,300 |  | 112,458 |  | $ 0 | $ 0
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Percent |  | (30.50%) |  |  | (0.00%) | (0.00%)
NOL reconciliation |  |  | 0 |  | $ (2,210) | $ (3,691)
Effective Income Tax Reconciliation Change Net Operating Loss, Percentage |  | (0.00%) |  |  | (0.80%) | (2.50%)
Other, net |  |  | (698) |  | $ 970 | $ 491
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent |  | (0.20%) |  |  | 0.30% | 0.30%
Income tax expense |  |  | (197,600) |  | $ (109,400) | $ (43,700)
Effective Income Tax Rate Reconciliation, Percent |  | (53.70%) |  |  | (37.70%) | (29.30%)
Reconciliation of the beginning and ending balances of the gross unrecognized benefits |  |  |  |  |  |
Balance at beginning of year |  |  | 56 |  | $ 56 | $ 56
Reductions due to lapse of statute of limitations |  |  | (56) |  | 0 | 0
Balance at the end of year | $ 0 |  | $ 0 |  | $ 56 | $ 56

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