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Intangible Assets, Net | 3 Months Ended
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Mar. 31, 2021
Intangible Assets, Net [Abstract] |
Intangible Assets, Net | 8.INTANGIBLE ASSETS, NET The following table provides the gross and net carrying amounts for each major class of intangible assets:
|  | As of March 31, 2021 |  | As of December 31, 2020
|  | Gross carrying |  | Accumulated |  | Net book |  | Gross carrying |  | Accumulated |  | Net book
|  | amount |  | amortization |  | value |  | amount |  | amortization |  | value
|  | (in thousands)
Current contract intangibles |  | $ | 4,794,137 |  | $ | (2,520,675) |  | $ | 2,273,462 |  | $ | 4,876,880 |  | $ | (2,471,438) |  | $ | 2,405,442
Network location intangibles |  |  | 1,754,579 |  |  | (1,043,943) |  |  | 710,636 |  |  | 1,770,944 |  |  | (1,020,236) |  |  | 750,708
Intangible assets, net |  | $ | 6,548,716 |  | $ | (3,564,618) |  | $ | 2,984,098 |  | $ | 6,647,824 |  | $ | (3,491,674) |  | $ | 3,156,150
All intangible assets noted above are included in the Company’s site leasing segment. Amortization expense relating to the intangible assets above was $109.8 million and $110.7 million for the three months ended March 31, 2021 and 2020, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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