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Investments (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Investments
Earnings from joint ventures	$ 305	$ 93
WMES
Investments
Investment in WMES joint venture at beginning of the period	23,485
Earnings from joint ventures	305
Investment in WMES joint venture at end of the period	$ 23,790

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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