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Earnings per share (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share [Line Items] |  |  |
Net income attributable to Consolidated Water Co. Ltd. common stockholders | $ 6,265,358 us-gaap_NetIncomeLoss | $ 8,594,519 us-gaap_NetIncomeLoss | $ 9,315,514 us-gaap_NetIncomeLoss
Less: preferred stock dividends | (11,485)us-gaap_DividendsPreferredStock | (11,222)us-gaap_DividendsPreferredStock | (9,080)us-gaap_DividendsPreferredStock
Net income available to common shares in the determination of basic earnings per common share | $ 6,253,873 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 8,583,297 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 9,306,434 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
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) | 14,697,896 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 14,633,884 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 14,578,518 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average number of preferred shares outstanding during the period (in shares) | 37,924 us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | 34,827 us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | 27,057 us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock
Potential dilutive effect of unexercised options (in shares) | 28,503 us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants | 35,169 us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants | 573 us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares) | 14,764,323 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 14,703,880 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 14,606,148 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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