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Summary of significant accounting policies (Tables) | 6 Months Ended
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Jun. 30, 2014
Accounting Policies [Abstract] |
Assets, Liabilities and Net Assets of Company's Venezuelan Subsidiaries | The following table sets forth the assets, liabilities and net assets of the Company’s Venezuelan subsidiaries, before intercompany eliminations, as of June 30, 2014 and December 31, 2013 and net revenues for the six-month periods ended June 30, 2014 and 2013:
|  | Six-month periods ended June 30, |
|  | 2014 |  |  | 2013 |
Venezuelan operations |  |  |  |  |  |  |  |
Net Revenues |  | $ | 35,908,018 |  |  | $ | 32,694,097 |
|  | June 30, 2014 |  |  | December 31, 2013 |
Assets |  |  | 59,760,695 |  |  |  | 126,873,804 |
Liabilities |  |  | (36,209,130 | ) |  |  | (62,437,338 | )
Net Assets |  | $ | 23,551,565 |  |  | $ | 64,436,466 |
Accumulated Other Comprehensive Income | Accumulated other comprehensive income The following table sets forth the Company’s accumulated other comprehensive income as of June 30, 2014 and the year ended December 31, 2013:
|  | June 30, 2014 |  |  | December 31, 2013 |
Foreign currency translation |  | $ | (103,583,097 | ) |  | $ | (87,481,437 | )
Unrealized gains on investments |  |  | 178,019 |  |  |  | 36,626 |
Estimated tax loss on unrealized gains on investments |  |  | (56,125 | ) |  |  | (11,159 | )
|  | $ | (103,461,203 | ) |  | $ | (87,455,970 | )
Summary of Changes in Accumulated Balances of Other Comprehensive Income | The following tables summarize the changes in accumulated balances of other comprehensive income for the six-month period ended June 30, 2014 and the year ended December 31, 2013:
|  | Unrealized Gains on Investments |  |  | Foreign Currency Translation |  |  | Estimated tax (expense) benefit |  |  | Total |
Balances as of December 31, 2013 |  | $ | 36,626 |  |  | $ | (87,481,437 | ) |  | $ | (11,159 | ) |  | $ | (87,455,970 | )
Other comprehensive income before reclassification adjustments for gains on available for sale investments |  |  | 178,019 |  |  |  | (16,101,660 | ) |  |  | (56,125 | ) |  |  | (15,979,766 | )
Amount of gain (loss) reclassified from accumulated other comprehensive income to net income |  |  | (36,626 | ) |  |  | — |  |  |  | 11,159 |  |  |  | (25,467 | )
Net current period other comprehensive income |  |  | 141,393 |  |  |  | (16,101,660 | ) |  |  | (44,966 | ) |  |  | (16,005,233 | )
Balances as of June 30, 2014 |  | $ | 178,019 |  |  | $ | (103,583,097 | ) |  | $ | (56,125 | ) |  | $ | (103,461,203 | )
Details about Accumulated Other Comprehensive Income Components for the three-month period ended June 30, 2014 |  | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income |  |  | Affected Line Item in the Statement of Income
Unrealized gains on investments |  | $ | 36,626 |  |  | Interest income and other financial gains
Estimated tax loss on unrealized gains on investments |  |  | (11,159 | ) |  | Income / asset tax expense
Total reclassifications for the period |  | $ | 25,467 |  |  | Total, net of income taxes

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e526-108580 + Details
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