INTANGIBLE ASSETS, NET (Tables)

6 Months Ended

Jun. 30, 2012

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

The following table provides the gross and net carrying amounts for each major class of intangible assets:

	As of June 30, 2012							As of December 31, 2011
	Gross carrying amount		Accumulated amortization			Net book value		Gross carrying amount		Accumulated amortization			Net book value
	(in thousands)
Current contract intangibles	$	1,841,744	$	(384,926	)	$	1,456,818	$	1,391,001	$	(333,522	)	$	1,057,479
Network location intangibles		881,040		(216,469	)		664,571		772,467		(190,162	)		582,305
Intangible assets, net	$	2,722,784	$	(601,395	)	$	2,121,389	$	2,163,468	$	(523,684	)	$	1,639,784