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Commitments and Contingencies - Additional Information (Detail)	12 Months Ended	204 Months Ended
	Dec. 31, 2018 USD ($) Case	Dec. 31, 2018 USD ($) Case	Dec. 31, 2017 Case
Commitments And Contingencies Disclosure [Abstract]
Cumulative settlement payments for cases involving asbestos-related claims | $		$ 2,900,000
Cumulative settlement payments made for cases involving asbestos-related claims with all legal fees other than corporate counsel expenses | $		2,700,000
Average cost per settled claim excluding legal fees | $	$ 36,000	$ 36,000
Number of claims pending	208	208	218
Number of new cases filed	96
Number of cases dismissed	63
Number of cases settled	43
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.

X

- Definition

The weighted average cost per settled claim based on the number of claims settled and the amount paid in aggregate for asbestos related claims.

+ References

No definition available.

+ Details

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- Definition

Litigation and settlement awarded from insurers.

+ References

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- Definition

Amount awarded from other party in judgment or settlement of litigation.

+ References

No definition available.

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- Definition

Number of claims dismissed.

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- Definition

Number of claims settled.

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- Definition

Describes management's process to evaluate the contingency matter and to estimate the impact on the financial statements and ongoing operations, such as added credit risk or loss of customers, including pertinent information to adequately disclose the matter and significant assumptions underlying the estimates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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Number of pending claims pertaining to a loss contingency.

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-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 4
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