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Equity (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Summary of Net income (loss) and aggregate net funding repaid to (provided by) the Company to variable interest entity |  |  |  |
Aggregate funding (provided by) repaid to the Company, net | $ (601) | $ (1,069) | $ 3,802 | $ 553
CCE [Member] |  |  |  |
Summary of Net income (loss) and aggregate net funding repaid to (provided by) the Company to variable interest entity |  |  |  |
Net income (loss) | 697 | 1,895 | 2,360 | 2,828
DAD [Member] |  |  |  |
Summary of Net income (loss) and aggregate net funding repaid to (provided by) the Company to variable interest entity |  |  |  |
Net income (loss) |  | (124) | (35) | (313)
Tari [Member] |  |  |  |
Summary of Net income (loss) and aggregate net funding repaid to (provided by) the Company to variable interest entity |  |  |  |
Net income (loss) |  | $ 61 | $ 10 | $ 98

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