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Earnings per share (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income attributable to Consolidated Water Co. Ltd. common stockholders	$ 908,690	$ 1,304,843	$ 7,504,542	$ 5,605,001
Less: preferred stock dividends	(2,885)	(2,270)	(8,655)	(6,810)
Net income available to common shares in the determination of basic earnings per common share	$ 905,805	$ 1,302,573	$ 7,495,887	$ 5,598,191
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	14,644,740	14,580,946	14,626,755	14,576,790
Plus: Weighted average number of preferred shares outstanding during the period	39,680	31,504	33,888	25,980
Potential dilutive effect of unexercised options	50,496	4,745	21,543	1,628
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	14,734,916	14,617,195	14,682,186	14,604,398

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