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 |