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Employee Benefit Plans (Details) - USD ($) | 12 Months Ended
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Feb. 28, 2017 | Feb. 29, 2016 | Feb. 28, 2015
Postemployment Benefits [Abstract] |  |  |
Costs recognized for postemployement benefit plan | $ 4,526,223 | $ 4,880,251 | $ 10,042,744

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_PostemploymentBenefitsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration