Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
IntangibleAssets [Line Items]
Gross Carrying Amount	$ 35,861	$ 5,940
Accumulated Amortization	2,908	1,217
INTANGIBLE ASSETS, net of amortization	32,953	4,723
Trademarks And Trade Names [Member]
IntangibleAssets [Line Items]
Gross Carrying Amount	2,645	200
Accumulated Amortization	80	9
INTANGIBLE ASSETS, net of amortization	$ 2,565	$ 191
Trademarks And Trade Names [Member] | Maximum [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	8 years	8 years
Technical Library [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	20 years	20 years
Gross Carrying Amount	$ 400	$ 400
Accumulated Amortization	56	41
INTANGIBLE ASSETS, net of amortization	344	359
Customer Relationships [Member]
IntangibleAssets [Line Items]
Gross Carrying Amount	27,314	3,600
Accumulated Amortization	1,487	788
INTANGIBLE ASSETS, net of amortization	$ 25,827	$ 2,812
Customer Relationships [Member] | Maximum [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	15 years	12 years
Customer Relationships [Member] | Minimum [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	8 years	8 years
Covenants Not to Compete [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	3 years	3 years
Gross Carrying Amount	$ 140	$ 140
Accumulated Amortization	140	121
INTANGIBLE ASSETS, net of amortization	$ 0	$ 19
Developed Technology [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	4 years	4 years
Gross Carrying Amount	$ 400	$ 400
Accumulated Amortization	333	258
INTANGIBLE ASSETS, net of amortization	$ 67	142
Order Backlog [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	1 year
Gross Carrying Amount	$ 1,571
Accumulated Amortization	257
INTANGIBLE ASSETS, net of amortization	$ 1,314
Construction Contract Value [Member]
IntangibleAssets [Line Items]
Estimated Useful Lives	1 year
Gross Carrying Amount	$ 2,191
Accumulated Amortization	555
INTANGIBLE ASSETS, net of amortization	1,636
Trademarks And Trade Names [Member]
IntangibleAssets [Line Items]
Gross Carrying Amount	1,200	1,200
Accumulated Amortization	0	0
INTANGIBLE ASSETS, net of amortization	$ 1,200	$ 1,200