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Earnings per share (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Earnings Per Share [Line Items] |  |  |
Net income attributable to Consolidated Water Co. Ltd. common stockholders | $ 8,594,519 | $ 9,315,514 | $ 6,113,218
Less: preferred stock dividends | (11,222) | (9,080) | (7,040)
Net income available to common shares in the determination of basic earnings per common share | $ 8,583,297 | $ 9,306,434 | $ 6,106,178
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) | 14,633,884 | 14,578,518 | 14,560,259
Plus: Weighted average number of preferred shares outstanding during the period | 34,827 | 27,057 | 19,892
Potential dilutive effect of unexercised options | 35,169 | 573 | 15,862
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares) | 14,703,880 | 14,606,148 | 14,596,013

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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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