v3.5.0.2
Commitments and Contingencies - Legal Proceedings - Additional Information (Detail)
$ in Millions
6 Months Ended
Jun. 30, 2016
USD ($)
Plaintiff
Loss Contingencies [Line Items]  
Accrual for lawsuits $ 34.5
Expected lawsuits reimbursement amount pursuant to the indemnity provisions of excess liability insurance policies 25.0
Offsetting receivable from insurance carriers $ 9.5
Calcasieu River Estuary in Lake Charles Louisiana [Member]  
Loss Contingencies [Line Items]  
Number of individuals that have filed lawsuits against the Company | Plaintiff 2,607