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Revenues (Tables) | 6 Months Ended
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Jun. 30, 2018
Schedule of Contractual Revenues [Line Items] |
Schedule of Contractual Revenue | The following table is a summary of the contracted amounts owed to the Company by customers pursuant to site rental contracts in effect as of June 30, 2018.
|  | Six months ending December 31, |  | Years ending December 31, |  |  |  |
|  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | Thereafter |  | Total
Contracted amounts(a) |  | $ | 2,039 |  |  | $ | 3,829 |  |  | $ | 3,552 |  |  | $ | 3,279 |  |  | $ | 3,054 |  |  | $ | 6,928 |  |  | $ | 22,681 |
(a) | Excludes amounts related to network services, as those contracts generally have a duration of one year or less.

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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 + Details
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