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taxes.","units":{"USD":[{"end":"2012-08-31","val":6070000,"accn":"0000807707-12-000041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-10-10","frame":"CY2012Q3I"},{"end":"2012-11-30","val":6010000,"accn":"0000807707-13-000003","fy":2012,"fp":"Q3","form":"10-Q","filed":"2013-01-09","frame":"CY2012Q4I"},{"end":"2013-02-28","val":5928000,"accn":"0000807707-13-000022","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2013-05-31","val":5835000,"accn":"0000807707-13-000031","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-07-10","frame":"CY2013Q2I"},{"end":"2013-08-31","val":6177000,"accn":"0000807707-13-000041","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-10-10","frame":"CY2013Q3I"},{"end":"2013-11-30","val":6101000,"accn":"0000807707-14-000003","fy":2013,"fp":"Q3","form":"10-Q","filed":"2014-01-08","frame":"CY2013Q4I"},{"end":"2014-02-28","val":6344000,"accn":"0000807707-14-000008","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-15","frame":"CY2014Q1I"},{"end":"2014-05-31","val":6204000,"accn":"0000807707-14-000017","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-07-10","frame":"CY2014Q2I"},{"end":"2014-08-31","val":6029000,"accn":"0000807707-14-000028","fy":2015,"fp":"Q2","form":"10-Q","filed":"2014-10-09","frame":"CY2014Q3I"},{"end":"2014-11-30","val":5849000,"accn":"0000807707-15-000002","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-01-08","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumSubleaseRentals":{"label":"Capital 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subleases.","units":{"USD":[{"end":"2012-08-31","val":100000,"accn":"0000807707-12-000041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-10-10","frame":"CY2012Q3I"},{"end":"2012-11-30","val":2150000,"accn":"0000807707-13-000003","fy":2012,"fp":"Q3","form":"10-Q","filed":"2013-01-09","frame":"CY2012Q4I"},{"end":"2013-02-28","val":1920000,"accn":"0000807707-13-000022","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2013-05-31","val":1740000,"accn":"0000807707-13-000031","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-07-10","frame":"CY2013Q2I"},{"end":"2013-08-31","val":1560000,"accn":"0000807707-13-000041","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-10-10","frame":"CY2013Q3I"},{"end":"2013-11-30","val":1380000,"accn":"0000807707-14-000003","fy":2013,"fp":"Q3","form":"10-Q","filed":"2014-01-08","frame":"CY2013Q4I"},{"end":"2014-02-28","val":1200000,"accn":"0000807707-14-000008","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-15","frame":"CY2014Q1I"},{"end":"2014-05-31","val":1020000,"accn":"0000807707-14-000017","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-07-10","frame":"CY2014Q2I"},{"end":"2014-08-31","val":840000,"accn":"0000807707-14-000028","fy":2015,"fp":"Q2","form":"10-Q","filed":"2014-10-09","frame":"CY2014Q3I"},{"end":"2014-11-30","val":660000,"accn":"0000807707-15-000002","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-01-08","frame":"CY2014Q4I"}]}},"CapitalLeasesIncomeStatementAmortizationExpense":{"label":"Capital 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Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents.","units":{"USD":[{"end":"2016-02-29","val":11767000,"accn":"0000807707-17-000040","fy":2018,"fp":"Q2","form":"10-Q","filed":"2017-10-10"},{"end":"2016-02-29","val":11767000,"accn":"0000807707-18-000005","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-01-09"},{"end":"2016-02-29","val":11767000,"accn":"0000807707-19-000013","fy":2019,"fp":"FY","form":"10-K","filed":"2019-05-14","frame":"CY2016Q1I"},{"end":"2016-08-31","val":4851000,"accn":"0000807707-17-000040","fy":2018,"fp":"Q2","form":"10-Q","filed":"2017-10-10","frame":"CY2016Q3I"},{"end":"2016-11-30","val":5672000,"accn":"0000807707-18-000005","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-01-09","frame":"CY2016Q4I"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-17-000040","fy":2018,"fp":"Q2","form":"10-Q","filed":"2017-10-10"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-18-000005","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-01-09"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-18-000034","fy":2018,"fp":"FY","form":"10-K","filed":"2018-05-14"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-18-000043","fy":2019,"fp":"Q1","form":"10-Q","filed":"2018-07-10"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-18-000052","fy":2019,"fp":"Q2","form":"10-Q","filed":"2018-10-10"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-19-000002","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-01-09"},{"end":"2017-02-28","val":7800000,"accn":"0000807707-19-000013","fy":2019,"fp":"FY","form":"10-K","filed":"2019-05-14","frame":"CY2017Q1I"},{"end":"2017-05-31","val":8060000,"accn":"0000807707-18-000043","fy":2019,"fp":"Q1","form":"10-Q","filed":"2018-07-10","frame":"CY2017Q2I"},{"end":"2017-08-31","val":45821000,"accn":"0000807707-17-000040","fy":2018,"fp":"Q2","form":"10-Q","filed":"2017-10-10"},{"end":"2017-08-31","val":45821000,"accn":"0000807707-18-000052","fy":2019,"fp":"Q2","form":"10-Q","filed":"2018-10-10","frame":"CY2017Q3I"},{"end":"2017-11-30","val":37514000,"accn":"0000807707-18-000005","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-01-09"},{"end":"2017-11-30","val":37514000,"accn":"0000807707-19-000002","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-01-09","frame":"CY2017Q4I"},{"end":"2018-02-28","val":51740000,"accn":"0000807707-18-000043","fy":2019,"fp":"Q1","form":"10-Q","filed":"2018-07-10"},{"end":"2018-02-28","val":51740000,"accn":"0000807707-18-000052","fy":2019,"fp":"Q2","form":"10-Q","filed":"2018-10-10"},{"end":"2018-02-28","val":51740000,"accn":"0000807707-19-000002","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-01-09","frame":"CY2018Q1I"},{"end":"2018-05-31","val":49827000,"accn":"0000807707-18-000043","fy":2019,"fp":"Q1","form":"10-Q","filed":"2018-07-10","frame":"CY2018Q2I"},{"end":"2018-08-31","val":44191000,"accn":"0000807707-18-000052","fy":2019,"fp":"Q2","form":"10-Q","filed":"2018-10-10","frame":"CY2018Q3I"},{"end":"2018-11-30","val":48718000,"accn":"0000807707-19-000002","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-01-09","frame":"CY2018Q4I"}]}},"CashAndCashEquivalentsFairValueDisclosure":{"label":"Cash and Cash Equivalents, Fair Value Disclosure","description":"Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. 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