Income Taxes (Summary Of Changes In Gross Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Gross Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits, beginning of year	$ 7,257	$ 10,459	$ 12,297
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	5,028	0	0
Increases due to tax positions taken during the period		0	1,982
Decreases due to settlements with taxing authorities	0	(3,202)	(3,820)
Gross unrecognized tax benefits, end of year	$ 12,285	$ 7,257	$ 10,459
Effective Income Tax Rate Reconciliation, Percent	32.72%	34.80%	26.96%
Minimum [Member]
Gross Unrecognized Tax Benefits [Roll Forward]
Effective Income Tax Rate Continuing Operations Before Net Increases Decreases Of Gross Unrecognized Tax Benefits	32.30%	35.13%	26.71%
Maximum [Member]
Gross Unrecognized Tax Benefits [Roll Forward]
Effective Income Tax Rate Reconciliation, Percent	32.72%	34.80%	26.96%