Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended				1 Months Ended			1 Months Ended			6 Months Ended		6 Months Ended		6 Months Ended		1 Months Ended		1 Months Ended		6 Months Ended	1 Months Ended		6 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012	Nov. 30, 2012	Nov. 30, 2010	Jan. 31, 2011 4.63 percent Senior Notes	May 31, 2013 4.63 percent Senior Notes	Nov. 30, 2012 4.63 percent Senior Notes	Sep. 30, 2012 3.95 Senior Notes	May 31, 2013 3.95 Senior Notes	Nov. 30, 2012 3.95 Senior Notes	May 31, 2013 4.82 percent Revenue Bonds	Nov. 30, 2012 4.82 percent Revenue Bonds	May 31, 2013 6.25 percent Term Loan Year	Nov. 30, 2012 6.25 percent Term Loan	May 31, 2013 TIF bond debt service funding commitment	Nov. 30, 2012 TIF bond debt service funding commitment	Mar. 31, 2012 5.40 Senior Notes	Nov. 30, 2012 5.40 Senior Notes	Jan. 31, 2011 Semi Annual Payment First Payment 4.63 percent Senior Notes	Sep. 30, 2012 Semi Annual Payment First Payment 3.95 Senior Notes	May 31, 2013 Semi Annual Payment First Payment TIF bond debt service funding commitment	Jan. 31, 2011 Semi Annual Payment Second Payment 4.63 percent Senior Notes	Sep. 30, 2012 Semi Annual Payment Second Payment 3.95 Senior Notes	May 31, 2013 Semi Annual Payment Second Payment TIF bond debt service funding commitment	May 31, 2013 Term Bond Due December One Twenty Seventeen TIF bond debt service funding commitment	May 31, 2013 Term Bond Due December One Twenty Twenty Seven TIF bond debt service funding commitment	May 31, 2013 Accumulated Other Comprehensive Loss	Nov. 30, 2012 Accumulated Other Comprehensive Loss
Debt Disclosure [Line Items]
Proceeds from long-term debt							$ 65,000,000			$ 100,000,000
Interest Expense	3,879,000	2,904,000	7,841,000	6,341,000
Debt, interest rate							4.63%	4.63%	4.63%	3.95%	3.95%	3.95%	4.82%	4.82%	6.25%	6.25%				5.40%							6.15%	6.75%
Debt Instrument Maturity Years															25
Debt Instrument Monthly Payment													29,000		292,000
Frequency of periodic payment							semi-annual			semi-annual
Debt Instrument Interest Rate Payment Date																					January 18	March 13	April 1	July 18	September 13	October 1
Long-term debt	276,632,000		276,632,000		276,932,000			65,000,000	65,000,000		100,000,000	100,000,000	818,000	970,000	50,136,000	50,318,000	60,678,000	60,644,000									11,600,000	49,700,000
Stockholders' Equity Attributable to Parent	1,275,683,000		1,275,683,000		1,248,810,000																								(4,967,000)	(5,296,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	700,000		700,000
Debt, maturity date																											Dec. 01, 2017	Dec. 01, 2027
Debt Instrument Payment Date																	October 1
Line of Credit Facility, Current Borrowing Capacity						300,000,000
Line of Credit Facility, Maximum Borrowing Capacity						500,000,000
Line of Credit Facility, Amount Outstanding	0		0
Extinguishment of Debt, Amount																			87,000,000
Payments of Debt Extinguishment Costs																			9,000,000
Loss on early redemption of debt	0	(9,144,000)	0	(9,144,000)															9,100,000
Interest Costs Capitalized	300,000	1,200,000	500,000	2,700,000
Deferred Finance Costs, Noncurrent, Net	$ 4,700,000		$ 4,700,000		$ 5,000,000