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Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2018
Intangible Assets, Net [Abstract] |
Intangible Assets, Net | 7.INTANGIBLE ASSETS, NET The following table provides the gross and net carrying amounts for each major class of intangible assets: ﻿
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﻿ |  | As of December 31, 2018 |  | As of December 31, 2017
﻿ |  | Gross carrying |  | Accumulated |  | Net book |  | Gross carrying |  | Accumulated |  | Net book
﻿ |  | amount |  | amortization |  | value |  | amount |  | amortization |  | value
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in thousands)
﻿Current contract intangibles |  | $ | 4,394,416 |  | $ | (1,928,030) |  | $ | 2,466,386 |  | $ | 4,355,171 |  | $ | (1,673,270) |  | $ | 2,681,901
﻿Network location intangibles |  |  | 1,669,859 |  |  | (804,780) |  |  | 865,079 |  |  | 1,617,441 |  |  | (701,211) |  |  | 916,230
﻿Intangible assets, net |  | $ | 6,064,275 |  | $ | (2,732,810) |  | $ | 3,331,465 |  | $ | 5,972,612 |  | $ | (2,374,481) |  | $ | 3,598,131
﻿ 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 $402.6 million, $384.1 million, and $369.9 million for the years ended December 31, 2018, 2017 and 2016, respectively. Estimated amortization expense on the Company’s intangibles assets is as follows: ﻿
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﻿For the year ended December 31, |  |  |  |  |  |  |  | (in thousands)
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﻿2019 |  |  |  |  |  |  |  | $ | 403,371
﻿2020 |  |  |  |  |  |  |  |  | 402,447
﻿2021 |  |  |  |  |  |  |  |  | 369,864
﻿2022 |  |  |  |  |  |  |  |  | 349,657
﻿2023 |  |  |  |  |  |  |  |  | 327,181
﻿ ﻿

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- References No definition available. + Details
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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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