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Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		10 years 4 months 24 days
Finite-Lived Intangible Assets, Gross		$ 58,786	$ 39,662
Finite-Lived Intangible Assets, Accumulated Amortization		(16,594)	(13,039)
Intangible Assets, Net (Excluding Goodwill)		42,192	26,623
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		7,754	5,084
Finite-Lived Intangible Assets, Accumulated Amortization		(1,593)	(1,267)
Intangible Assets, Net (Excluding Goodwill)		$ 6,161	3,817
Trademarks and Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Trademarks and Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Technical Library
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Finite-Lived Intangible Assets, Gross		$ 400	400
Finite-Lived Intangible Assets, Accumulated Amortization		(136)	(121)
Intangible Assets, Net (Excluding Goodwill)		264	279
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		46,269	33,539
Finite-Lived Intangible Assets, Accumulated Amortization		(13,797)	(11,051)
Intangible Assets, Net (Excluding Goodwill)		$ 32,472	22,488
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Finite-Lived Intangible Assets, Gross		$ 1,300	40
Finite-Lived Intangible Assets, Accumulated Amortization		(59)	(9)
Intangible Assets, Net (Excluding Goodwill)		$ 1,241	31
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year
Finite-Lived Intangible Assets, Gross		$ 3,063	599
Finite-Lived Intangible Assets, Accumulated Amortization		(1,009)	(591)
Intangible Assets, Net (Excluding Goodwill)		$ 2,054	$ 8
Construction Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		1 year

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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