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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
|  |  |  |  | Commercial | Infrastructure |  |
|  | Residential |  | & Industrial | Solutions |  | Total
Balance at September 30, 2014 |  | $ | 8,631 |  | $ | - | $ | 6,362 |  | $ | 14,993
Acquisitions "Note 18" |  |  | - |  |  | - |  | 2,256 |  |  | 2,256
Balance at September 30, 2015 |  |  | 8,631 |  |  | - |  | 8,618 |  |  | 17,249
Acquisitions "Note 18" |  |  | - |  |  | 3,806 |  | 19,458 |  |  | 23,264
Divestitures "Note 18" |  |  | - |  |  | - |  | (577) |  |  | (577)
Balance at September 30, 2016 |  | $ | 8,631 |  | $ | 3,806 | $ | 27,499 |  | $ | 39,936
Schedule Of Intangible Assets And Goodwill [Table Text Block] |
|  |  |  |  | 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
|  |  |  |  | September 30, 2015
|  |  | Estimated |  |  |  |  |  |  |  |
|  |  | Useful Lives |  |  | Gross Carrying |  |  | Accumulated |  |  |
|  |  | (in Years) |  |  | Amount |  |  | Amortization |  | Net
Trademarks/trade names |  | 8 - Indefinite |  | $ | 1,400 |  | $ | 9 |  | $ | 1,391
Technical library |  | 20 |  |  | 400 |  |  | 41 |  |  | 359
Customer relationships |  | 8 - 12 |  |  | 3,600 |  |  | 788 |  |  | 2,812
Covenants not to compete |  | 3 |  |  | 140 |  |  | 121 |  |  | 19
Developed technology |  | 4 |  |  | 400 |  |  | 258 |  |  | 142
Total |  |  |  | $ | 5,940 |  | $ | 1,217 |  | $ | 4,723
Schedule Of Finite Lived Intangible Assets Future Amortization Expense [Table Text Block] |
| Year Ended September 30, |  |  |
| 2017 |  | $ | 5,050
| 2018 |  |  | 3,154
| 2019 |  |  | 2,903
| 2020 |  |  | 2,818
| 2021 |  |  | 2,714
| Thereafter |  |  | 15,084
| Total |  | $ | 31,723

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