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Income Taxes (Summary Of Tax Credit Carryforwards) (Details) $ in Thousands | 12 Months Ended
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Aug. 31, 2020 USD ($)
Tax Credit Carryforward [Line Items] |
Credits Generated | $ 19,311
Credits Used in Prior Years | (10,161)
Credits Used in Current Year |
Credits Carried Forward | $ 9,150
2011 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2011
Credit Expires August 31, | Aug. 31, 2021
Credits Generated | $ 3,445
Credits Used in Prior Years | (414)
Credits Used in Current Year |
Credits Carried Forward | $ 3,031
2012 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2012
Credit Expires August 31, | Aug. 31, 2022
Credits Generated | $ 2,563
Credits Used in Prior Years | (2,563)
Credits Used in Current Year |
Credits Carried Forward |
2013 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2013
Credit Expires August 31, | Aug. 31, 2023
Credits Generated | $ 2,815
Credits Used in Prior Years | (2,815)
Credits Used in Current Year |
Credits Carried Forward |
2014 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2014
Credit Expires August 31, | Aug. 31, 2024
Credits Generated | $ 1,378
Credits Used in Prior Years | (1,378)
Credits Used in Current Year |
Credits Carried Forward |
2015 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2015
Credit Expires August 31, | Aug. 31, 2025
Credits Generated | $ 1,422
Credits Used in Prior Years | (1,422)
Credits Used in Current Year |
Credits Carried Forward |
2016 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2016
Credit Expires August 31, | Aug. 31, 2026
Credits Generated | $ 1,569
Credits Used in Prior Years | (1,569)
Credits Used in Current Year |
Credits Carried Forward |
2017 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2017
Credit Expires August 31, | Aug. 31, 2027
Credits Generated | $ 1,804
Credits Used in Prior Years |
Credits Used in Current Year |
Credits Carried Forward | $ 1,804
2018 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2018
Credit Expires August 31, | Aug. 31, 2028
Credits Generated | $ 1,727
Credits Used in Prior Years |
Credits Used in Current Year |
Credits Carried Forward | $ 1,727
2019 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2019
Credit Expires August 31, | Aug. 31, 2029
Credits Generated | $ 1,578
Credits Used in Prior Years |
Credits Used in Current Year |
Credits Carried Forward | $ 1,578
2020 [Member] |
Tax Credit Carryforward [Line Items] |
Credit Generated in Fiscal Year Ended August 31, | Aug. 31, 2020
Credit Expires August 31, | Aug. 31, 2030
Credits Generated | $ 1,010
Credits Used in Prior Years |
Credits Used in Current Year |
Credits Carried Forward | $ 1,010

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