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Summary of Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended
Summary of Accounting Policies (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accounting Policies [Abstract]
Revenue, Affiliate Percentage	$ 0.64	$ 0.82	$ 0.73	$ 0.82