Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
	Feb. 28, 2013	Nov. 30, 2012	Oct. 31, 2002 2002 STAR Bonds	Feb. 28, 2013 2002 STAR Bonds
Commitments and Contingencies Disclosure [Line Items]
Proceeds from long-term debt			$ 6,300,000
Frequency of periodic payment			annual
Debt, maturity date			Dec. 01, 2022
Long-term debt	276,783,000	276,932,000		1,700,000
Standby letter of credit agreements in favor of third parties	4,000,000
General Insurance Expense	$ 1,500,000