| Non-Controlling Interest (Tables) | 3 Months Ended | ||||||||||||||||||||||||||||
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| Mar. 31, 2012 | |||||||||||||||||||||||||||||
| Noncontrolling Interest [Abstract] | |||||||||||||||||||||||||||||
| Schedule of Noncontrolling Interest [Table Text Block] | 
The following table sets forth the components of our non-controlling interest balance since inception attributable to third-party investors’ interests at March 31, 2012 (in thousands): 
 
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- Definition Schedule of Noncontrolling Interest [Table Text Block] No definition available. 
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- Details 
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