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Intangible Assets, Net
 6 Months Ended
Jun. 30, 2016
Intangible Assets, Net [Abstract]  
Intangible Assets, Net

6.INTANGIBLE ASSETS, NET

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





 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



 

As of June 30, 2016

 

As of December 31, 2015



 

Gross carrying

 

Accumulated

 

Net book

 

Gross carrying

 

Accumulated

 

Net book



 

amount

 

amortization

 

value

 

amount

 

amortization

 

value



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



 

(in thousands)

Current contract intangibles

 

$

 4,112,204 

 

$

 (1,270,749)

 

$

 2,841,455 

 

$

 3,904,864 

 

$

 (1,118,493)

 

$

 2,786,371 

Network location intangibles

 

 

 1,497,913 

 

 

 (550,614)

 

 

 947,299 

 

 

 1,446,293 

 

 

 (497,251)

 

 

 949,042 

Intangible assets, net

 

$

 5,610,117 

 

$

 (1,821,363)

 

$

 3,788,754 

 

$

 5,351,157 

 

$

 (1,615,744)

 

$

 3,735,413 



All intangible assets noted above are included in the Company’s site leasing segment. The Company amortizes its intangible assets using the straight-line method over 15 years. Amortization expense relating to the intangible assets above was $92.7 million and $90.7 million for the three months ended June 30, 2016 and 2015, respectively, and $182.8 million and $182.1 million for the six months ended June 30, 2016 and 2015, respectively.