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 Statement of Financial Accounting Standard (FAS)

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-Name Accounting Principles Board Opinion (APB)

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The profit or loss on sales of previously unissued stock by subsidiaries or equity investees made to investors outside the consolidated group that is not reported as operating income. Represents the difference in the parent company's carrying amount of the equity interest in the subsidiary or equity investee immediately before and after the transaction.

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-Name Regulation S-X (SX)

-Number 210

-Section 04

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-Subparagraph h

-Article 9

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-Name Staff Accounting Bulletin (SAB)

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The number of units or percentage investment held by the managing member or general partner of the LLC or LP.

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-Publisher AICPA

-Name Practice Bulletin (PB)

-Number 14

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Amount of the effect of a change in accounting principle on basic earnings per share.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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-Paragraph 17

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Cash received on stock transaction after deduction of issuance costs.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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INVESTMENT IN NUSTAR ENERGY Narrative 1 (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Subsidiary, Sale of Stock [Line Items]
Investment in NuStar Energy in order to maintain 2% interest	$ 18,005,000	$ 17,031,000	$ 22,416,000
General partner interest percentage	2.00%		2.00%
Percent ownership in NuStar Energy	15.00%	16.30%	17.60%	18.70%
Gain related to NuStar Energy L.P.'s issuance of limited partner units	10,689,000	8,074,000	7,767,000
NuStar Energy - September 2012 Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Limited partner units issued by NuStar Energy	7,130,000
Price of limited partner units issued by NuStar Energy, per unit	$ 48.94
Proceeds, net of issuance cost, from issuance of NuStar Energy limited partner units	336,800,000
Investment in NuStar Energy in order to maintain 2% interest	7,100,000
Per unit impact related to NuStar Energy L.P.'s issuance of limited partner units	$ 0.25
NuStar Energy - 2011 Offerings [Member]
Subsidiary, Sale of Stock [Line Items]
Investment in NuStar Energy in order to maintain 2% interest		6,700,000
Per unit impact related to NuStar Energy L.P.'s issuance of limited partner units		$ 0.19
NuStar Energy - December 2011 Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Limited partner units issued by NuStar Energy		6,037,500
Price of limited partner units issued by NuStar Energy, per unit		$ 53.45
Proceeds, net of issuance cost, from issuance of NuStar Energy limited partner units		311,400,000
NuStar Energy - September and October 2011 Offerings [Member]
Subsidiary, Sale of Stock [Line Items]
Limited partner units issued by NuStar Energy		108,029
Proceeds, net of issuance cost, from issuance of NuStar Energy limited partner units		5,900,000
NuStar Energy - May 2010 Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Limited partner units issued by NuStar Energy			4,400,000
Price of limited partner units issued by NuStar Energy, per unit			$ 56.55
Proceeds, net of issuance cost, from issuance of NuStar Energy limited partner units			240,100,000
Investment in NuStar Energy in order to maintain 2% interest			$ 5,100,000
Per unit impact related to NuStar Energy L.P.'s issuance of limited partner units			$ 0.18