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Segment Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Data [Abstract] |
Schedule of Segment Reporting Information |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Domestic Site |  | Int'l Site |  | Site |  | Not Identified |  |
﻿ |  | Leasing |  | Leasing |  | Development |  | by Segment |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿For the year ended December 31, 2018 |  | (in thousands)
﻿Revenues |  | $ | 1,400,095 |  | $ | 340,339 |  | $ | 125,261 |  | $ | — |  | $ | 1,865,695
﻿Cost of revenues (2) |  |  | 266,131 |  |  | 106,165 |  |  | 96,499 |  |  | — |  |  | 468,795
﻿Operating profit |  |  | 1,133,964 |  |  | 234,174 |  |  | 28,762 |  |  | — |  |  | 1,396,900
﻿Selling, general, and administrative |  |  | 72,879 |  |  | 27,082 |  |  | 16,215 |  |  | 26,350 |  |  | 142,526
﻿Acquisition related adjustments and expenses |  |  | 5,268 |  |  | 5,693 |  |  | — |  |  | — |  |  | 10,961
﻿Asset impairment and decommission costs |  |  | 18,857 |  |  | 7,932 |  |  | 345 |  |  | — |  |  | 27,134
﻿Depreciation, amortization and accretion |  |  | 511,823 |  |  | 151,570 |  |  | 2,556 |  |  | 6,164 |  |  | 672,113
﻿Operating income (loss) |  |  | 525,137 |  |  | 41,897 |  |  | 9,646 |  |  | (32,514) |  |  | 544,166
﻿Other expense (principally interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿and other expense) |  |  |  |  |  |  |  |  |  |  |  | (492,482) |  |  | (492,482)
﻿Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,684
﻿Cash capital expenditures (3) |  |  | 338,610 |  |  | 258,785 |  |  | 1,561 |  |  | 3,724 |  |  | 602,680
﻿For the year ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Revenues |  | $ | 1,308,389 |  | $ | 314,784 |  | $ | 104,501 |  | $ | — |  | $ | 1,727,674
﻿Cost of revenues (2) |  |  | 260,826 |  |  | 98,701 |  |  | 86,785 |  |  | — |  |  | 446,312
﻿Operating profit |  |  | 1,047,563 |  |  | 216,083 |  |  | 17,716 |  |  | — |  |  | 1,281,362
﻿Selling, general, and administrative |  |  | 67,263 |  |  | 24,320 |  |  | 15,433 |  |  | 23,681 |  |  | 130,697
﻿Acquisition related adjustments and expenses |  |  | 8,171 |  |  | 4,196 |  |  | — |  |  | — |  |  | 12,367
﻿Asset impairment and decommission costs |  |  | 29,523 |  |  | 6,994 |  |  | 180 |  |  | — |  |  | 36,697
﻿Depreciation, amortization and accretion |  |  | 498,842 |  |  | 135,155 |  |  | 2,580 |  |  | 6,523 |  |  | 643,100
﻿Operating income (loss) |  |  | 443,764 |  |  | 45,418 |  |  | (477) |  |  | (30,204) |  |  | 458,501
﻿Other expense (principally interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿and other expense) |  |  |  |  |  |  |  |  |  |  |  | (341,610) |  |  | (341,610)
﻿Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 116,891
﻿Cash capital expenditures (3) |  |  | 225,074 |  |  | 358,691 |  |  | 1,221 |  |  | 3,859 |  |  | 588,845
﻿For the year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Revenues |  | $ | 1,273,866 |  | $ | 264,204 |  | $ | 95,055 |  | $ | — |  | $ | 1,633,125
﻿Cost of revenues (2) |  |  | 260,941 |  |  | 81,274 |  |  | 78,682 |  |  | — |  |  | 420,897
﻿Operating profit |  |  | 1,012,925 |  |  | 182,930 |  |  | 16,373 |  |  | — |  |  | 1,212,228
﻿Selling, general, and administrative (4) |  |  | 72,701 |  |  | 35,897 |  |  | 13,039 |  |  | 21,712 |  |  | 143,349
﻿Acquisition related adjustments and expenses |  |  | 6,233 |  |  | 6,907 |  |  | — |  |  | — |  |  | 13,140
﻿Asset impairment and decommission costs |  |  | 26,073 |  |  | 1,824 |  |  | — |  |  | 2,345 |  |  | 30,242
﻿Depreciation, amortization and accretion |  |  | 509,108 |  |  | 119,466 |  |  | 3,402 |  |  | 6,213 |  |  | 638,189
﻿Operating income (loss) |  |  | 398,810 |  |  | 18,836 |  |  | (68) |  |  | (30,270) |  |  | 387,308
﻿Other expense (principally interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿and other expense) |  |  |  |  |  |  |  |  |  |  |  | (300,005) |  |  | (300,005)
﻿Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87,303
﻿Cash capital expenditures (3) |  |  | 310,256 |  |  | 102,282 |  |  | 1,955 |  |  | 3,710 |  |  | 418,203
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Domestic Site |  | Int'l Site |  | Site |  | Not Identified |  |
﻿ |  | Leasing |  | Leasing |  | Development |  | by Segment (1) |  | Total
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Assets |  | (in thousands)
﻿As of December 31, 2018 |  | $ | 5,035,826 |  | $ | 2,042,800 |  | $ | 60,775 |  | $ | 74,306 |  | $ | 7,213,707
﻿As of December 31, 2017 |  | $ | 5,171,190 |  | $ | 2,028,479 |  | $ | 49,487 |  | $ | 71,049 |  | $ | 7,320,205
﻿ ﻿ (1)Assets not identified by segment consist primarily of general corporate assets. (2)Excludes depreciation, amortization, and accretion. (3)Includes cash paid for capital expenditures and acquisitions and vehicle capital lease additions. (4) International site leasing includes the impact of the $16,498 Oi reserve for the year ended December 31, 2016.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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