Earnings Per Share (Summary of components of calculations of basic and diluted earnings per share) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net loss attributable to common shareholders	$ (15,947,280)	$ (10,325,464)	$ (33,861,726)	$ (23,388,120)
Denominator:
Weighted average number of common shares outstanding	84,150,851	37,977,052	67,194,806	33,107,175