Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2017

Intangible Assets, Net [Abstract]

Gross And Net Carrying Amounts For Each Major Class Of Intangible Assets

	As of September 30, 2017						As of December 31, 2016
	Gross carrying		Accumulated		Net book		Gross carrying		Accumulated		Net book
	amount		amortization		value		amount		amortization		value
	(in thousands)
Current contract intangibles	$	4,284,068	$	(1,612,010)	$	2,672,058	$	4,141,968	$	(1,401,025)	$	2,740,943
Network location intangibles		1,555,579		(676,927)		878,652		1,515,348		(599,367)		915,981
Intangible assets, net	$	5,839,647	$	(2,288,937)	$	3,550,710	$	5,657,316	$	(2,000,392)	$	3,656,924