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Investment in Marketable Securities (Details) (Marketable Securities [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Marketable Securities [Member]
 
Summary of Marketable Securities  
Basis $ 64
Gross Unrealized Gain/(Loss) 1,685
Gross realized Gain/(Loss) 0
Fair Value At Quoted Prices in Active Markets (Level1) $ 1,749