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Acquisitions (Details Textual) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	12 Months Ended			12 Months Ended			12 Months Ended
	Mar. 11, 2013	Jun. 30, 2013	Dec. 31, 2012 Interlube [Member]	Jun. 30, 2013 Interlube [Member] Person	Mar. 11, 2013 Interlube [Member]	Dec. 31, 2012 Smith Services [Member]	Jun. 30, 2013 Smith Services [Member] Person	Apr. 11, 2013 Smith Services [Member]	Dec. 31, 2012 Standard Machine [Member]	Jun. 30, 2013 Standard Machine [Member] Person	May 13, 2013 Standard Machine [Member]
Acquisitions (Textual) [Abstract]
Cost of acquisition					$ 14.8			$ 13.3			$ 39.7
Cash Acquired from Acquisition	0.3	0.1
Entity Number of Employees				90			140			125
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period			$ 13			$ 17			$ 31

X

- Definition

Number of persons employed by the Entity

+ References

No definition available.

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- Details

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X

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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X

- Definition

Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.

+ References

No definition available.

+ Details

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X

- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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