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Nonrecognized Subsequent Event (Details) |  |  | 3 Months Ended
--- | --- | --- | ---
Feb. 13, 2013 BOB | Dec. 31, 2012 USD ($) | Dec. 31, 2012 BOB | Mar. 31, 2013 Maximum [Member] USD ($) | Mar. 31, 2013 Minimum [Member] USD ($)
Foreign currency exchange rate | 6.3 |  | 4.3 |  |
Foreign currency asset, value |  | $ 7,549,000 |  |  |
Expected charges related to currency rate re-measurement |  |  |  | $ 2,400,000 | $ 1,600,000

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- Definition The reporting currency-denominated expense (including losses) amount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
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- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
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