Quarterly report pursuant to Section 13 or 15(d)

Hurricane Remediation and Insurance Claims - Additional Information (Detail)

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Hurricane Remediation and Insurance Claims - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 30, 2008
Sep. 30, 2013
Business Interruption Loss [Line Items]    
Retention amount per occurrence $ 10.0  
Maximum insurance coverage policy limit due to named windstorms for per incident 150.0  
Maximum insurance coverage policy limit except for, property damage due to named windstorms 250.0  
Insurance recoveries related to hurricanes   $ 147.3