Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2002	Feb. 29, 2016
Commitments and Contingencies Disclosure [Line Items]
Standby letter of credit agreements in favor of third parties		$ 4.0
2002 STAR Bonds
Commitments and Contingencies Disclosure [Line Items]
Proceeds from long-term debt	$ 6.3
Frequency of periodic payment	annual
Debt, maturity date	Dec. 01, 2022
Long-term debt		$ 0.9