Name:	sbac_PercentageOfAllowableAnnualizedBorrowerEbitdaForForeignSubsidiaries
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- Definition

Revised ebitda to maintain under debt agreement.

+ References

No definition available.

+ Details

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- Definition

Revised percentage of allowable annualized borrower ebitda for foreign subsidiaries.

+ References

No definition available.

+ Details

Name:	sbac_RevisedPercentageOfAllowableAnnualizedBorrowerEbitdaForForeignSubsidiaries
Namespace Prefix:	sbac_
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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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- Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		1 Months Ended		9 Months Ended
	Aug. 27, 2013	Aug. 27, 2013 Revolving Credit Facility [Member]	Aug. 27, 2013 Senior Credit Agreement [Member]	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Sep. 30, 2013 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity						$ 770.0
Eurodollar Rate margin				1.875%	2.375%
Base rate margin				0.875%	1.375%
Line of credit facility, commitment fee				0.375%	0.50%
Line of credit facility, outstanding						0
Line of credit facility, remaining borrowing capacity						770.0
Debt to EBITDA ratio			6.0
Debt to EBITDA ratio increased			6.5
Debt to EBITDA ratio	$ 6.5
Allowable annualized percentage borrower EBITDA for foreign subsidiaries		10.00%
Allowable annualized percentage borrower EBITDA for foreign subsidiaries, revised		35.00%