Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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+ References

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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.

+ References

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 350
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Acquisitions - Acquired Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Mar. 02, 2020	Jan. 08, 2020	Nov. 02, 2020	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Fair value of intangible assets acquired					$ 1,568
Packet Host, Inc.
Business Acquisition [Line Items]
Fair value of intangible assets acquired				$ 58,500
Packet Host, Inc. \| Trade names
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 1,300
Acquired intangible assets, estimated useful lives (years)	3 years
Weighted-average estimated useful lives (years)	3 years
Packet Host, Inc. \| Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 52,100
Acquired intangible assets, estimated useful lives (years)	10 years
Weighted-average estimated useful lives (years)	10 years
Packet Host, Inc. \| Technology-Based Intangible Assets
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 5,100
Acquired intangible assets, estimated useful lives (years)	3 years
Weighted-average estimated useful lives (years)	3 years
Axtel
Business Acquisition [Line Items]
Fair value of intangible assets acquired				22,750
Axtel \| Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 22,750
Acquired intangible assets, estimated useful lives (years)		15 years
Weighted-average estimated useful lives (years)		15 years
Bell Acquisition
Business Acquisition [Line Items]
Fair value of intangible assets acquired				$ 75,631
Bell Acquisition \| Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired			$ 75,631
Acquired intangible assets, estimated useful lives (years)			15 years
Weighted-average estimated useful lives (years)			15 years