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Segment Information - Revenue and Gross Profit of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 154,518	$ 127,533
Gross Profit	54,316	53,601
Network Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	138,374	113,809
Gross Profit	47,721	48,808
Services & Support [Member]
Segment Reporting Information [Line Items]
Revenue	16,144	13,724
Gross Profit	$ 6,595	$ 4,793

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