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Restatement of Previously Issued Financial Statements - Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Feb. 28, 2017 | Nov. 30, 2016 | Aug. 31, 2016 | May 31, 2016 | Feb. 29, 2016 | Nov. 30, 2015 | Aug. 31, 2015 | May 31, 2015 | Feb. 28, 2017 | Feb. 29, 2016 | Feb. 28, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income | $ 12,270 | $ 16,646 | $ 10,159 | $ 22,189 | $ 15,182 | $ 22,822 | $ 14,866 | $ 22,674 | $ 61,264 | $ 75,544 | $ 65,616
Comprehensive Income |  |  |  |  |  |  |  |  | 62,730 | 67,816 | 53,802
As Reported |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income | 11,584 | 18,251 | 10,023 | 21,063 | 16,076 | 23,547 | 17,243 | 19,924 | 60,921 | 76,790 | 64,943
Comprehensive Income |  |  |  |  |  |  |  |  | 62,387 | 69,062 | 53,129
Correction |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income | $ 686 | $ (1,605) | $ 136 | $ 1,126 | $ (894) | $ (725) | $ (2,377) | $ 2,750 | 343 | (1,246) | 673
Comprehensive Income |  |  |  |  |  |  |  |  | $ 343 | $ (1,246) | $ 673

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831223 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 + Details
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