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Commitments and Contingencies - Legal Matters - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Cases
Sep. 30, 2014
Cases
Dec. 31, 2013
Cases
Commitments and Contingencies Disclosure [Abstract]      
Cumulative settlement payments for cases involving asbestos-related claims $ 0.5 $ 0.7  
Average cost per settled claim excluding legal fees 25,000 25,000  
Number of claims pending 196 196 173
Number of new cases filed   41  
Number of cases dismissed   18  
Number of cases settled   0  
Settlement recovering expense $ 0.2    
Assessment regarding Loss contingency impact Description   We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows.