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Earnings per share (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Line Items]        
Net income attributable to Consolidated Water Co. Ltd. common stockholders $ 2,759,693 $ 2,853,850 $ 3,414,602 $ 6,595,853
Less: preferred stock dividends (3,139) (2,996) (6,278) (5,991)
Net income available to common shares in the determination of basic earnings per common share $ 2,756,554 $ 2,850,854 $ 3,408,324 $ 6,589,862
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) 14,698,499 14,636,916 14,692,654 14,617,613
Weighted average number of preferred shares outstanding during the period (in shares) 37,990 31,998 37,701 30,944
Potential dilutive effect of unexercised options (in shares) 23,670 15,601 33,703 11,036
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares) 14,760,159 14,684,515 14,764,058 14,659,593