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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following summarizes information related to the computation of basic and diluted EPS for the respective years ended December 31:

		Year Ended December 31,
		2012				2011				2010
Net income attributable to Consolidated Water Co. Ltd. common stockholders		$	9,315,514			$	6,113,218			$	6,292,025
Less: preferred stock dividends			(9,080	)			(7,040	)			(5,350	)
Net income available to common shares in the determination of basic earnings per common share		$	9,306,434			$	6,106,178			$	6,286,675
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders			14,578,518				14,560,259				14,547,065
Plus:
Weighted average number of preferred shares outstanding during the period			27,057				19,892				18,723
Potential dilutive effect of unexercised options			573				15,862				32,106
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders			14,606,148				14,596,013				14,597,894

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations.

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