Business Acquisitions and Noncontrolling Interests - Acquired Intangibles (Details) - Filter Resources, Inc. [Member] $ in Thousands	Dec. 17, 2014 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated value	$ 10,880
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated value	$ 10,800
Weighted average useful life	15 years
Amortization method	Straight-line
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated value	$ 80
Weighted average useful life	1 year
Amortization method	Straight-line

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.

No definition available.

+ Details

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 35
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=66005732&loc=d3e15372-109273

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

No definition available.

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