Ebitda to maintain under debt agreement.

No definition available.

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Namespace Prefix:	sbac_
Data Type:	xbrli:pureItemType
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Period Type:	duration

- Definition

Percentage of allowable annualized borrower ebitda for foreign subsidiaries.

+ References

No definition available.

+ Details

Name:	sbac_PercentageOfAllowableAnnualizedBorrowerEbitdaForForeignSubsidiaries
Namespace Prefix:	sbac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Revised ebitda to maintain under debt agreement.

+ References

No definition available.

+ Details

Name:	sbac_RevisedEbitdaToMaintainUnderDebtAgreement
Namespace Prefix:	sbac_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Revised percentage of allowable annualized borrower ebitda for foreign subsidiaries.

+ References

No definition available.

+ Details

Name:	sbac_RevisedPercentageOfAllowableAnnualizedBorrowerEbitdaForForeignSubsidiaries
Namespace Prefix:	sbac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Debt (Senior Credit Agreement) (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended			1 Months Ended	12 Months Ended						1 Months Ended	12 Months Ended	0 Months Ended		1 Months Ended	12 Months Ended		12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 07, 2014 Revolving Credit Facility [Member]	Apr. 18, 2013 Revolving Credit Facility [Member]	May 09, 2012 Revolving Credit Facility [Member]	Aug. 27, 2013 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Mar. 14, 2013 Revolving Credit Facility [Member]	Jan. 28, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Apr. 02, 2012 Revolving Credit Facility [Member]	Feb. 11, 2010 Revolving Credit Facility [Member]	Aug. 27, 2013 Senior Credit Agreement [Member]	Dec. 31, 2013 Senior Credit Agreement [Member]	Feb. 07, 2014 2011 Term Loan [Member]	Apr. 18, 2013 2011 Term Loan [Member]	Apr. 24, 2013 2011 Term Loan [Member]	Dec. 31, 2013 2011 Term Loan [Member]	Jun. 30, 2011 2011 Term Loan [Member]	Dec. 31, 2013 2012-1 Term Loan A [Member]	May 09, 2012 2012-1 Term Loan A [Member]	Feb. 07, 2014 2012-2 Term Loan [Member]	Dec. 31, 2013 2012-2 Term Loan [Member]	Dec. 31, 2012 2012-2 Term Loan [Member]	Sep. 28, 2012 2012-2 Term Loan [Member]	Feb. 07, 2014 2014 Term Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 700,000,000		$ 770,000,000	$ 770,000,000	$ 730,000,000		$ 600,000,000	$ 500,000,000
Debt instrument, face amount	5,910,041,000	5,440,073,000						215,000,000			100,000,000								500,000,000	500,000,000	200,000,000	200,000,000		109,971,000	300,000,000	300,000,000	1,500,000
Deferred financing fees						1,100,000													4,900,000		2,700,000	2,700,000				3,500,000	5,600,000
Revolving credit facility, maturity date						May 09, 2017
Debt to EBITDA ratio														6.0	6.5
Debt to EBITDA ratio increased														6.5
Allowable annualized percentage borrower EBITDA for foreign subsidiaries							10.00%
Allowable annualized percentage borrower EBITDA for foreign subsidiaries, revised							35.00%
Repayments of long-term debt					100,000,000											180,500,000	310,700,000	310,700,000	312,000,000		10,000,000		110,000,000
Repayments of revolving credit facility	$ 225,000,000	$ 484,000,000	$ 270,000,000	$ 390,000,000				$ 225,000,000