Annual report pursuant to Section 13 and 15(d)

Equity Investments (Equity Investment Income Statement Disclosure) (Details)

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Equity Investments (Equity Investment Income Statement Disclosure) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]      
Gross revenue $ 162,401 $ 39,918 $ 16,955
Net income (loss) $ 17,350 $ 1,943 $ 6,375