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Goodwill and Intangible Assets - Summary of Carrying Values of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 151,876	$ 36,876
Accumulated Amortization	43,215	31,925
Total	108,661	4,951
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	109,794	32,823
Accumulated Amortization	35,855	31,604
Total	73,939	1,219
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,635	3,610
Accumulated Amortization	3,671	295
Total	12,964	3,315
Backlog [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,000
Accumulated Amortization	3,250
Total	9,750
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,447	443
Accumulated Amortization	439	26
Total	$ 12,008	$ 417

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- Definition

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

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-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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