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Goodwill and Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 192,098	$ 126,814
Accumulated Amortization	52,672	40,497
Net Book Value	139,426	86,317
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	113,606	80,909
Accumulated Amortization	32,517	27,533
Net Book Value	81,089	53,376
Covenants Not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,524	8,602
Accumulated Amortization	3,548	2,466
Net Book Value	6,976	6,136
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	54,568	37,303
Accumulated Amortization	12,140	10,498
Net Book Value	42,428	$ 26,805
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,400
Accumulated Amortization	4,467
Net Book Value	$ 8,933

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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