Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2019

Intangible Assets, Net [Abstract]

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

	As of December 31, 2019						As of December 31, 2018
	Gross carrying		Accumulated		Net book		Gross carrying		Accumulated		Net book
	amount		amortization		value		amount		amortization		value
	(in thousands)
Current contract intangibles	$	4,996,591	$	(2,218,404)	$	2,778,187	$	4,394,416	$	(1,928,030)	$	2,466,386
Network location intangibles		1,764,484		(915,898)		848,586		1,669,859		(804,780)		865,079
Intangible assets, net	$	6,761,075	$	(3,134,302)	$	3,626,773	$	6,064,275	$	(2,732,810)	$	3,331,465

Estimated Future Amortization Expense

For the year ended December 31,	(in thousands)
2020	$	450,547
2021		417,906
2022		396,139
2023		372,294
2024		343,481