Commitments and Contingencies - Legal Matters - Additional Information (Detail)	3 Months Ended	9 Months Ended	177 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2016 USD ($) Case	Sep. 30, 2016 USD ($) Case	Dec. 31, 2015 Case
Commitments And Contingencies Disclosure [Abstract]
Cumulative settlement payments for cases involving asbestos-related claims | $	$ 500,000		$ 1,100,000
Cumulative settlement payments made for cases involving asbestos-related claims including legal fees | $			1,000,000
Average cost per settled claim excluding legal fees | $		$ 30,000	$ 30,000
Number of claims pending | Case		217	217	221
Number of new cases filed | Case		55
Number of cases dismissed | Case		56
Number of cases settled | Case		3
Settlement recovering expense | $	$ 200,000
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.