Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
	Nov. 30, 2013 customer	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012 customer	Aug. 31, 2012	May 31, 2012	Feb. 28, 2012	Nov. 30, 2013 customer	Nov. 30, 2012 customer	Nov. 30, 2011 customer
Significant Accounting Policies [Line Items]
Customer balance in excess of 10% of total revenues									0	0	0
Customer balance in excess of 10% of net accounts receivable	0				0				0	0
Depreciation of property and equipment									$ 16,340,000	$ 14,931,000	$ 13,145,000
Impairment of goodwill									0
Purchase price allocation period, maximum									1 year
Number of days after acquisition in which severance related costs are recorded as acquisition expenses									90 days
Income tax benefit	(15,500,000)	(7,900,000)	(3,100,000)	100,000	(15,300,000)	(7,400,000)	(7,200,000)	(3,300,000)	(26,400,000)	(33,200,000)	(37,300,000)
Gains (Losses) from foreign currency exchange									(700,000)	(700,000)	(1,900,000)
Advertising costs									3,700,000	3,000,000	2,400,000
Error Related to Tax Benefit | Restatement Adjustment
Significant Accounting Policies [Line Items]
Income tax benefit									2,200,000
Kings Limited Partnership, L.P
Significant Accounting Policies [Line Items]
Expenses from transactions with related party, for which no payment was received									400,000
Affiliated Entity
Significant Accounting Policies [Line Items]
Expenses from transactions with related party, for which no payment was received									11,500,000	9,200,000
Revenue from related parties											$ 9,900,000