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