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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
|  | Commercial |  | Infrastructure |  |  |
|  | & Industrial |  | Solutions | Residential |  | Total
Balance at September 30, 2015 |  | $ | - |  | $ | 8,618 | $ | 8,631 |  | $ | 17,249
Acquisitions "Note 18" |  |  | 3,806 |  |  | 19,458 |  | - |  |  | 23,264
Divestitures "Note 18" |  |  | - |  |  | (577) |  | - |  |  | (577)
Balance at September 30, 2016 |  |  | 3,806 |  |  | 27,499 |  | 8,631 |  |  | 39,936
Acquisitions "Note 18" |  |  | 3,411 |  |  | 3,710 |  | - |  |  | 7,121
Divestitures "Note 18" |  |  | - |  |  | (51) |  | - |  |  | (51)
Purchase Accounting Adjustments |  |  | (41) |  |  | (272) |  | - |  |  | (313)
Balance at September 30, 2017 |  | $ | 7,176 |  | $ | 30,886 | $ | 8,631 |  | $ | 46,693
Schedule Of Intangible Assets And Goodwill [Table Text Block] |
|  |  |  |  | September 30, 2017
|  |  | Estimated |  |  |  |  |  |  |  |
|  |  | Useful Lives |  |  | Gross Carrying |  |  | Accumulated |  |  |
|  |  | (in Years) |  |  | Amount |  |  | Amortization |  | Net
Trademarks/trade names |  | 5 - 20 |  | $ | 4,643 |  | $ | 440 |  | $ | 4,203
Technical library |  | 20 |  |  | 400 |  |  | 81 |  |  | 319
Customer relationships |  | 6 - 15 |  |  | 31,115 |  |  | 4,741 |  |  | 26,374
Developed technology |  | 4 |  |  | - |  |  | - |  |  | -
Backlog |  | 1 |  |  | 2,412 |  |  | 2,130 |  |  | 282
Construction contracts |  | 1 |  |  | 2,399 |  |  | 2,164 |  |  | 235
Total |  |  |  | $ | 40,969 |  | $ | 9,556 |  | $ | 31,413
|  |  |  |  | September 30, 2016
|  |  | Estimated |  |  |  |  |  |  |  |
|  |  | Useful Lives |  |  | Gross Carrying |  |  | Accumulated |  |  |
|  |  | (in Years) |  |  | Amount |  |  | Amortization |  | Net
Trademarks/trade names |  | 5 - 20 |  | $ | 3,845 |  | $ | 139 |  | $ | 3,706
Technical library |  | 20 |  |  | 400 |  |  | 61 |  |  | 339
Customer relationships |  | 6 - 15 |  |  | 27,414 |  |  | 2,003 |  |  | 25,411
Developed technology |  | 4 |  |  | 400 |  |  | 358 |  |  | 42
Backlog |  | 1 |  |  | 1,621 |  |  | 545 |  |  | 1,076
Construction contracts |  | 1 |  |  | 2,191 |  |  | 1,042 |  |  | 1,149
Total |  |  |  | $ | 35,871 |  | $ | 4,148 |  | $ | 31,723
Schedule Of Finite Lived Intangible Assets Future Amortization Expense [Table Text Block] |
| Year Ended September 30, |  |  |
| 2018 |  | $ | 3,867
| 2019 |  |  | 3,252
| 2020 |  |  | 3,167
| 2021 |  |  | 2,865
| 2022 |  |  | 2,795
| Thereafter |  |  | 15,467
| Total |  | $ | 31,413

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