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Commitments and Contingencies - Legal Matters - Additional Information (Detail)
9 Months Ended 213 Months Ended
Sep. 30, 2019
USD ($)
Case
Sep. 30, 2019
USD ($)
Case
Dec. 31, 2018
Case
Commitments And Contingencies Disclosure [Abstract]      
Cumulative settlement payments for cases involving asbestos-related claims | $   $ 3,000,000  
Cumulative settlement payments made for cases involving asbestos-related claims with all legal fees other than corporate counsel expenses | $   2,800,000  
Average cost per settled claim excluding legal fees | $ $ 35,000 $ 35,000  
Number of claims pending 206 206 208
Number of new cases filed 51    
Number of cases dismissed 45    
Number of cases settled 8    
Assessment regarding Loss contingency impact Description We are not aware of any 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.