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Restricted Cash (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Restricted Cash [Abstract] |  |
Surety, payment and performance bonds | $ 40.0 | $ 42.0
Collateral payment for performance bonds | 2.7 | 6.1
Collateral related to workers compensation policy | $ 2.6 | $ 2.3

X
- Definition Collateral for surety payment and performance bonds. + References No definition available. + Details
Name: | sbac_CollateralForSuretyPaymentAndPerformanceBonds
Namespace Prefix: | sbac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Collateral for workers compensation policy. + References No definition available. + Details
Name: | sbac_CollateralForWorkersCompensationPolicy
Namespace Prefix: | sbac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Surety payment and performance bonds. + References No definition available. + Details
Name: | sbac_SuretyPaymentAndPerformanceBonds
Namespace Prefix: | sbac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration