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Contractual interest rate for funds borrowed, under the debt agreement.

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-Name Regulation S-X (SX)

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-Section 02

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-Name Accounting Standards Codification

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-Subparagraph (SX 210.5-02.22(a)(1))

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

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-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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-Name Accounting Standards Codification

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-Subparagraph (SX 210.9-03.16)

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-Name Accounting Standards Codification

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Condensed Consolidating Guarantor Financial Statements Condensed Consolidating Guarantor Financial Statements (Details Textual) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Senior Notes	$ 300,000	$ 0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Equity Method Investment, Ownership Percentage	100.00%
Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Semcrude Pipeline [Member]
Condensed Financial Statements, Captions [Line Items]
Equity Method Investment, Ownership Percentage	33.00%