Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013	Nov. 30, 2013
Debt Disclosure [Line Items]
Long-term debt	$ 274,166,000		$ 274,166,000		$ 274,487,000
Stockholders' Equity Attributable to Parent	1,318,388,000		1,318,388,000		1,287,155,000
Interest expense	2,703,000	3,879,000	5,836,000	7,841,000
Financing costs deferred	4,100,000		4,100,000		4,400,000
4.63 percent Senior Notes
Debt Disclosure [Line Items]
Proceeds from long-term debt			65,000,000
Debt, interest rate	4.63%		4.63%		4.63%
Frequency of periodic payment			semi-annual
Debt Instrument, Covenant, Leverage Ratio, Maximum	3.50		3.50
Debt Instrument, Covenant, Interest Coverage Ratio, Maximum	2.0		2.0
Debt Instrument, Covenant Consolidated Net Worth, Percentage, Maximum	15.00%		15.00%
Long-term debt	65,000,000		65,000,000		65,000,000
4.63 percent Senior Notes | Semi Annual Payment, First Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			January 18
4.63 percent Senior Notes | Semi Annual Payment, Second Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			July 18
3.95 percent Senior Notes
Debt Disclosure [Line Items]
Proceeds from long-term debt			100,000,000
Debt, interest rate	3.95%		3.95%		3.95%
Frequency of periodic payment			semi-annual
Debt Instrument, Covenant, Leverage Ratio, Maximum	3.50		3.50
Debt Instrument, Covenant Consolidated Net Worth, Percentage, Maximum	15.00%		15.00%
Long-term debt	100,000,000		100,000,000		100,000,000
3.95 percent Senior Notes | Semi Annual Payment, First Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			March 13
3.95 percent Senior Notes | Semi Annual Payment, Second Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			September 13
4.82 percent Revenue Bonds
Debt Disclosure [Line Items]
Debt, interest rate	4.82%		4.82%		4.82%
Long-term debt	502,000		502,000		662,000
Debt, monthly payment			29,000
6.25 percent Term Loan
Debt Disclosure [Line Items]
Debt, interest rate	6.25%		6.25%		6.25%
Long-term debt	49,754,000		49,754,000		49,948,000
Debt, monthly payment			292,000
Debt term	25		25
TIF bond debt service funding commitment
Debt Disclosure [Line Items]
Long-term debt	58,910,000		58,910,000		58,877,000
Principal payment date			October 1
TIF bond debt service funding commitment | Semi Annual Payment, First Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			April 1
TIF bond debt service funding commitment | Semi Annual Payment, Second Payment
Debt Disclosure [Line Items]
Debt Instrument Interest Rate Payment Date			October 1
TIF bond debt service funding commitment | Term Bond Due December 1st 2017
Debt Disclosure [Line Items]
Debt, interest rate	6.15%		6.15%
Long-term debt	9,800,000		9,800,000
Debt, maturity date			Dec. 01, 2017
TIF bond debt service funding commitment | Term Bond Due December 1st 2027
Debt Disclosure [Line Items]
Debt, interest rate	6.75%		6.75%
Long-term debt	49,700,000		49,700,000
Debt, maturity date			Dec. 01, 2027
2012 Credit Facility
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio, Maximum	3.50		3.50
Debt Instrument, Covenant, Interest Coverage Ratio, Maximum	2.5		2.5
Credit Facility current borrowing capacity	300,000,000		300,000,000
Credit Facility potential borrowing capacity	500,000,000		500,000,000
Debt instrument basis points			0.50%
Credit Facility amount outstanding	0		0
2012 Credit Facility | Minimum
Debt Disclosure [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.125%
2012 Credit Facility | Maximum
Debt Disclosure [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.225%
2012 Credit Facility | Standby Letters of Credit [Member]
Debt Disclosure [Line Items]
Credit Facility current borrowing capacity	25,000,000		25,000,000
2012 Credit Facility | Swing Line Loan [Member]
Debt Disclosure [Line Items]
Credit Facility current borrowing capacity	10,000,000		10,000,000
Four Quarters Ending after any Permitted Acquisition [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio, Maximum	4.0		4.0
Accumulated Other Comprehensive Loss
Debt Disclosure [Line Items]
Stockholders' Equity Attributable to Parent	$ (4,310,000)		$ (4,310,000)		$ (4,638,000)
London Interbank Offered Rate (LIBOR) [Member] | 2012 Credit Facility
Debt Disclosure [Line Items]
Debt instrument basis points			1.00%
London Interbank Offered Rate (LIBOR) [Member] | 2012 Credit Facility | Minimum
Debt Disclosure [Line Items]
Debt instrument basis points			1.00%
London Interbank Offered Rate (LIBOR) [Member] | 2012 Credit Facility | Maximum
Debt Disclosure [Line Items]
Debt instrument basis points			1.625%