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Legal and Other Proceedings - Additional Information (Detail)
3 Months Ended
Mar. 31, 2016
USD ($)
Loss Contingencies [Line Items]  
Additions to other significant pending legal or other proceedings $ 0
Goldstein Case [Member]  
Loss Contingencies [Line Items]  
Disputed amount 5,000,000
Reasonably possible losses for legal proceedings, minimum 0
Reasonably possible losses for legal proceedings, maximum $ 5,000,000