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Wynnewood Acquisition (Details) (GWEC, USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Dec. 31, 2011 subsidiary	Mar. 31, 2012	Dec. 15, 2011
GWEC
Acquisition
Number of wholly-owned subsidiaries of acquired entity	2
Preliminary purchase price			$ 592.3
Amount of increase in preliminary purchase price		1.2
Refund resulting from post-closing working capital and capital expenditure adjustments		14.6
Transaction fees and expenses included in selling, general and administrative expense		$ 3.7

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- Definition

Represents the amount of increase in the preliminary purchase price of the acquired entity.

+ References

No definition available.

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- Definition

Represents the preliminary purchase price of the acquired entity.

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- Definition

Amount of refund that resulted from post-closing working capital and capital expenditure adjustments.

+ References

No definition available.

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- Definition

Represents the number of wholly owned subsidiaries of acquired entity.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 59

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=6909708&loc=d3e1043-128460

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