XML 86 R70.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Concentration of Credit Risk (Summary of Significant Customers and Percentage of Total Revenue for Specified Time Periods Derived from Such Customers) (Details) - Revenue [Member] | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
AT&T [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 24.00% | 25.00% | 25.70%
Sprint [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 17.90% | 15.10% | 16.10%
T-Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 16.40% | 16.50% | 17.00%
Verizon Wireless [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 14.70% | 15.20% | 15.20%
Domestic Site Leasing [Member] | AT&T [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 31.90% | 32.70% | 32.70%
Domestic Site Leasing [Member] | Sprint [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 19.60% | 18.90% | 19.80%
Domestic Site Leasing [Member] | T-Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 20.30% | 19.70% | 19.60%
Domestic Site Leasing [Member] | Verizon Wireless [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 19.00% | 19.00% | 18.20%
International Site Leasing [Member] | Oi S.A. [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 35.50% | 42.20% | 43.90%
International Site Leasing [Member] | Telefonica [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 26.70% | 25.70% | 26.40%
International Site Leasing [Member] | Claro [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 11.40% | 10.00% | 9.40%
Site Development [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 7.00% |  |
Site Development [Member] | Sprint [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 47.10% | 12.90% | 11.70%
Site Development [Member] | T-Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 16.40% | 26.90% | 28.40%
Site Development [Member] | Verizon Wireless [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 6.40% | 12.80% | 16.50%
Site Development [Member] | Nokia, Inc. [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 3.20% | 10.10% | 7.10%

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_AtTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_SprintMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_TMobileMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_VerizonWirelessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sbac_DomesticSiteLeasingRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sbac_InternationalSiteLeasingRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_OiS.a.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_TelefonicaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_ClaroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sbac_SiteDevelopmentConsultingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=sbac_NokiaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |