Long-Term Debt (Parenthetical) (Detail)	1 Months Ended
	Nov. 30, 2010	May 31, 2013 4.63 percent Senior Notes	Nov. 30, 2012 4.63 percent Senior Notes	Jan. 31, 2011 4.63 percent Senior Notes	May 31, 2013 3.95 Senior Notes	Nov. 30, 2012 3.95 Senior Notes	Sep. 30, 2012 3.95 Senior Notes	Jan. 31, 2011 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	Nov. 30, 2012 6.25 percent Term Loan	Nov. 30, 2010 TIF bond debt service funding commitment	Nov. 30, 2010 LIBOR Minimum	Nov. 30, 2010 LIBOR Maximum
Debt Instrument [Line Items]
Debt, interest rate		4.63%	4.63%	4.63%	3.95%	3.95%	3.95%		4.82%	4.82%	6.25%	6.25%
Debt instrument basis points														1.00%	1.625%
2010 Credit Facility interest rate description	Accrues interest at LIBOR plus 100.0 - 162.5 basis points, depending on the better of its debt rating as determined by specified rating agencies or the Company's leverage ratio.
Debt, due date				2021-01				2024-09			2034-10
Termination of revolving credit facility													2017-11