Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Feb. 28, 2013	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Operating Loss Carryforwards [Line Items]
Change in valuation allowance		$ (1,400,000)
Deferred tax liabilities, short-term portion		200,000
Net operating loss carryforwards, expiration date		2032
Tax credit carryforwards, expiration date		Nov. 30, 2031
Cumulative undistributed foreign earnings		32,900,000
Unrecognized deferred tax liability related to undistributed earnings		800,000
Estimated interest and penalties		0	0	100,000
Accrued estimated interest and penalties		200,000	300,000
Decrease to unrecognized tax benefits related to settlements with taxing authorities	1,200,000	1,176,000	0	0
Two Zero Three Two Expiration [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		70,200,000
Indefinite-Lived Carryforwards [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		13,300,000
Tax credit carryforwards		1,000,000
2031 Expiration [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards		$ 9,500,000