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Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2018

Intangible Assets, Net [Abstract]

Gross and Net Carrying Amounts for each Major Class of Intangible Assets



		As of December 31, 2018									As of December 31, 2017
		Gross carrying			Accumulated			Net book			Gross carrying			Accumulated			Net book
		amount			amortization			value			amount			amortization			value

		(in thousands)
Current contract intangibles		$	4,394,416		$	(1,928,030)		$	2,466,386		$	4,355,171		$	(1,673,270)		$	2,681,901
Network location intangibles			1,669,859			(804,780)			865,079			1,617,441			(701,211)			916,230
Intangible assets, net		$	6,064,275		$	(2,732,810)		$	3,331,465		$	5,972,612		$	(2,374,481)		$	3,598,131



Estimated Future Amortization Expense



For the year ended December 31,								(in thousands)

2019								$	403,371
2020									402,447
2021									369,864
2022									349,657
2023									327,181



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- References

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ 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)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ 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)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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