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Marketable Securities
3 Months Ended
Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities
Marketable Securities
 
 
 
 
Our marketable securities consist primarily of investments in preferred stock of $22.3 million and $22.2 million as of March 31, 2014 and December 31, 2013, respectively. We classify our marketable securities as available-for-sale and carry them at fair value with unrealized gains or losses classified as a component of accumulated other comprehensive income. There were no gains or losses recognized on sales of marketable securities for the three months ended March 31, 2014 and 2013.