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Marketable Securities
9 Months Ended
Sep. 30, 2012
Marketable Securities [Abstract]  
Marketable Securities
7. Marketable Securities

Marketable securities consist of the Company’s ownership of various investments. The Company had no marketable securities as of September 30, 2012. As of December 31, 2011, the Company had $1.2 million of marketable securities, which were classified as available-for-sale and recorded at fair value. During the three months ended March 31, 2012, the Company sold certain of its marketable securities for approximately $0.9 million. In addition, the Company recorded impairment charges of $0.3 million in the three months ended June 30, 2012. No impairment charges were recorded for the three and nine months ended September 30, 2011.