Equity method investment ownership percentage by other company.

No definition available.

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- Definition

Interest in joint venture foreign.

+ References

No definition available.

+ Details

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- Definition

Joint venture expiration year.

+ References

No definition available.

+ Details

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- Definition

The term, with the joint venture was formed.

+ References

No definition available.

+ Details

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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 35
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=99375318&loc=d3e32787-111569

+ Details

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Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Period Type:	instant

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Investments in Foreign Joint Ventures - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Joint_Ventures	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Schedule Of Equity Method Investments [Line Items]
Interest in joint venture foreign \| Joint_Ventures			2
Net sales	$ 13,268,000	$ 8,673,000	$ 34,258,000	$ 28,415,000
Affiliated Entity
Schedule Of Equity Method Investments [Line Items]
Net sales	$ 0	$ 20,000	$ 10,000	$ 70,000
BOMAY
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	40.00%		40.00%
Joint venture expiration year			2018
Joint venture term			12 years
Baoji Oilfield Machinery Co. Ltd.
Schedule Of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%		51.00%
AA Energies, Inc.
Schedule Of Equity Method Investments [Line Items]
Interest in Joint Venture	9.00%		9.00%
MIEFE
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	41.00%		41.00%
Written down of equity method investment					$ 0
MIEFE's general manager
Schedule Of Equity Method Investments [Line Items]
Interest in Joint Venture	8.00%		8.00%
Sonepar of France
Schedule Of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%		51.00%