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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Aug. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract] |
Carrying Amount in Goodwill by Segment |
($ in thousands) |  | Irrigation |  |  | Infrastructure |  |  | Total |
Balance as of August 31, 2017 |  | $ | 60,978 |  |  | $ | 16,153 |  |  | $ | 77,131 |
Divestiture of businesses |  |  | (12,294 | ) |  | — |  |  |  | (12,294 | )
Foreign currency translation |  |  | (93 | ) |  |  | (73 | ) |  |  | (166 | )
Balance as of August 31, 2018 |  |  | 48,591 |  |  |  | 16,080 |  |  |  | 64,671 |
Foreign currency translation |  |  | (24 | ) |  |  | (260 | ) |  |  | (284 | )
Balance as of August 31, 2019 |  | $ | 48,567 |  |  | $ | 15,820 |  |  | $ | 64,387 |
Schedule of Intangible Assets and Weighted Average Remaining Life Finite and Infinite Excluding Goodwill |
|  | August 31, |
|  | 2019 |  |  | 2018 |
|  | Weighted |  |  | Gross |  |  |  |  |  |  | Weighted |  |  | Gross |  |  |  |  |
|  | average |  |  | carrying |  |  | Accumulated |  |  | average |  |  | carrying |  |  | Accumulated |
($ in thousands) |  | years |  |  | amount |  |  | amortization |  |  | years |  |  | amount |  |  | amortization |
Amortizable intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents and developed technology |  |  | 4.0 |  |  | $ | 26,547 |  |  | $ | (21,097 | ) |  |  | 5.7 |  |  | $ | 26,831 |  |  | $ | (19,656 | )
Customer relationships |  |  | 3.6 |  |  |  | 16,439 |  |  |  | (9,779 | ) |  |  | 5.2 |  |  |  | 16,459 |  |  |  | (8,668 | )
Non-compete agreements |  |  | 0.4 |  |  |  | 1,132 |  |  |  | (1,107 | ) |  |  | 0.8 |  |  |  | 1,137 |  |  |  | (1,048 | )
Other |  |  | — |  |  |  | 110 |  |  |  | (110 | ) |  |  | 1.1 |  |  |  | 110 |  |  |  | (85 | )
Unamortizable intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames |  | N/A |  |  |  | 12,247 |  |  |  | — |  |  | N/A |  |  |  | 12,297 |  |  |  | — |
Total |  |  | 3.8 |  |  | $ | 56,475 |  |  | $ | (32,093 | ) |  |  | 5.5 |  |  | $ | 56,834 |  |  | $ | (29,457 | )
Schedule of Future Estimated Amortization of Intangible Assets |
Fiscal years |  | $ in thousands |
2020 |  | $ | 2,527 |
2021 |  |  | 1,866 |
2022 |  |  | 1,698 |
2023 |  |  | 1,595 |
2024 |  |  | 1,595 |
Thereafter |  |  | 2,854 |
|  | $ | 12,135 |

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