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EQUITY INVESTMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity investments
Total earnings from equity investments	$ 1,266	$ 1,629
Muskegon Pipeline LLC
Equity investments
Total earnings from equity investments	249	241
Transport4, LLC
Equity investments
Total earnings from equity investments	67	56
West Shore Pipe Line Company
Equity investments
Total earnings from equity investments	660	1,250
South Portland Terminal LLC
Equity investments
Total earnings from equity investments	$ 290	$ 82

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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