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Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
IntangibleAssets [Line Items] |  |
Gross Carrying Amount | $ 35,871 | $ 5,940
Accumulated Amortization | 4,148 | 1,217
INTANGIBLE ASSETS, net of amortization | 31,723 | 4,723
Trademarks And Trade Names - Indefinite [Member] |  |
IntangibleAssets [Line Items] |  |
Gross Carrying Amount |  | 1,200
Accumulated Amortization |  | 0
INTANGIBLE ASSETS, net of amortization |  | 1,200
Trademarks And Trade Names - Indefinite [Member] |  |
IntangibleAssets [Line Items] |  |
Gross Carrying Amount | 3,845 | 200
Accumulated Amortization | 139 | 9
INTANGIBLE ASSETS, net of amortization | $ 3,706 | $ 191
Trademarks And Trade Names - Indefinite [Member] | Minimum [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 5 years | 8 years
Trademarks And Trade Names - Indefinite [Member] | Maximum [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 20 years |
Technical Library [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 20 years | 20 years
Gross Carrying Amount | $ 400 | $ 400
Accumulated Amortization | 61 | 41
INTANGIBLE ASSETS, net of amortization | 339 | 359
Customer Relationships [Member] |  |
IntangibleAssets [Line Items] |  |
Gross Carrying Amount | 27,414 | 3,600
Accumulated Amortization | 2,003 | 788
INTANGIBLE ASSETS, net of amortization | $ 25,411 | $ 2,812
Customer Relationships [Member] | Minimum [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 6 years | 8 years
Customer Relationships [Member] | Maximum [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 15 years | 12 years
Covenants Not to Compete [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 3 years | 3 years
Gross Carrying Amount |  | $ 140
Accumulated Amortization |  | 121
INTANGIBLE ASSETS, net of amortization |  | $ 19
Develeoped Technology [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 4 years | 4 years
Gross Carrying Amount | $ 400 | $ 400
Accumulated Amortization | 358 | 258
INTANGIBLE ASSETS, net of amortization | $ 42 | $ 142
Order Backlog [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 1 year |
Gross Carrying Amount | $ 1,621 |
Accumulated Amortization | 545 |
INTANGIBLE ASSETS, net of amortization | $ 1,076 |
Construction Contract Value [Member] |  |
IntangibleAssets [Line Items] |  |
Estimated Useful Lives | 1 year |
Gross Carrying Amount | $ 2,191 |
Accumulated Amortization | 1,042 |
INTANGIBLE ASSETS, net of amortization | $ 1,149 |

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