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Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Feb. 28, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 28,726			$ 15,621
Intangibles net	12,859			$ 8,458
Payments of business, net of cash acquired	18,974	$ 0
SubCon [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired			100.00%
Goodwill	7,000
Intangibles net	4,800
MICOS Telecom [Member]
Business Acquisition [Line Items]
Goodwill	6,200
SubCon and MICOS Telcom [Member]
Business Acquisition [Line Items]
Goodwill	13,200
Intangibles net	4,800
Payments of business, net of cash acquired	19,000
Net working capital	$ 4,200

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Net working capital.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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