XML 89 R80.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt (Secured Tower Revenue Securities) (Narrative) (Details) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 16, 2010
Oct. 15, 2014
Aug. 09, 2012
Apr. 18, 2013
Feb. 07, 2014
Apr. 24, 2009
Debt Instrument [Line Items]                  
Deferred financing fees $ 17,572,000us-gaap_AmortizationOfFinancingCosts $ 15,560,000us-gaap_AmortizationOfFinancingCosts $ 12,870,000us-gaap_AmortizationOfFinancingCosts            
Repayments of revolving credit facility 790,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit 225,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit 484,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit            
Aggregate debt 7,860,799,000us-gaap_LongTermDebt 5,876,607,000us-gaap_LongTermDebt              
Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Aggregate number of tower sites owned by Borrowers 9,659sbac_AggregateNumberOfTowerSitesOwnedByBorrowers
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember		                
Property management fee percentage 4.50%sbac_PropertyManagementFeePercentage
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember		                
U.S. Treasury rate term 10 years                
Interest added to Treasury rate and credit-based spread for non-compliance 5.00%sbac_InterestAddedToTreasuryRateAndCreditBasedSpreadForNonCompliance
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember		                
2010 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 9 months                
Deferred financing fees       18,000,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandTenSecuredTowerRevenueSecuritiesMember		          
4.254% 2010-1 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount       680,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		          
Debt instrument, interest rate, stated percentage 4.254%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		     4.254%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		          
Repayment date of debt instrument       Apr. 15, 2015          
Debt instrument, maturity date Apr. 15, 2015     Apr. 16, 2040          
Deferred financing fees         1,100,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		        
Repayments of long-term debt         680,000,000us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		        
Aggregate debt   680,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_FourPointTwoFiveFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenOneMember		              
5.101% 2010-2 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount       550,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_FivePointOneZeroOnePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenTwoMember		          
Debt instrument, interest rate, stated percentage 5.101%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_FivePointOneZeroOnePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenTwoMember		     5.101%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_FivePointOneZeroOnePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenTwoMember		          
Repayment date of debt instrument       Apr. 17, 2017          
Debt instrument, maturity date Apr. 17, 2017     Apr. 15, 2042          
Aggregate debt 550,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_FivePointOneZeroOnePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenTwoMember		 550,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_FivePointOneZeroOnePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTenHyphenTwoMember		              
2012 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 12 months                
2.933% 2012-1 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount           610,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		      
Debt instrument, interest rate, stated percentage 2.933%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		         2.933%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		      
Repayment date of debt instrument           Dec. 15, 2017      
Debt instrument, maturity date Dec. 15, 2017         Dec. 15, 2042      
Deferred financing fees           14,900,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		      
Aggregate debt 610,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		 610,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointNineThreeThreePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandTwelveHyphenOneMember		              
2013 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount             1,330,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandThirteenSecuredTowerRevenueSecuritiesMember		    
Deferred financing fees             25,500,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandThirteenSecuredTowerRevenueSecuritiesMember		    
Debt instrument, weighted average interest rate             3.218%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandThirteenSecuredTowerRevenueSecuritiesMember		    
Weighted average life of debt instrument through the anticipated repayment date             7 years 2 months 12 days    
2.240% 2013-1C Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 12 months                
Debt instrument, face amount             425,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointTwoFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneCMember		    
Debt instrument, interest rate, stated percentage 2.24%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointTwoFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneCMember		           2.24%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointTwoFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneCMember		    
Repayment date of debt instrument             Apr. 17, 2018    
Debt instrument, maturity date Apr. 16, 2018           Apr. 17, 2043    
Aggregate debt 425,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointTwoFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneCMember		 425,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointTwoFourPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneCMember		              
3.598% 2013-1D Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 12 months                
Debt instrument, face amount             330,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointFiveNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneDMember		    
Debt instrument, interest rate, stated percentage 3.598%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointFiveNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneDMember		           3.598%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointFiveNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneDMember		    
Repayment date of debt instrument             Apr. 17, 2018    
Debt instrument, maturity date Apr. 16, 2018           Apr. 17, 2043    
Aggregate debt 330,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointFiveNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneDMember		 330,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointFiveNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenOneDMember		              
3.722% 2013-2C Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 18 months                
Debt instrument, face amount             575,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointSevenTwoTwoPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenTwoCMember		    
Debt instrument, interest rate, stated percentage 3.722%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointSevenTwoTwoPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenTwoCMember		           3.722%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointSevenTwoTwoPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenTwoCMember		    
Repayment date of debt instrument             Apr. 17, 2023    
Debt instrument, maturity date Apr. 17, 2023           Apr. 17, 2048    
Aggregate debt 575,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointSevenTwoTwoPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenTwoCMember		 575,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointSevenTwoTwoPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandThirteenHyphenTwoCMember		              
2014 Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount         1,540,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandFourteenSecuredTowerRevenueSecuritiesMember		        
Deferred financing fees         21,800,000us-gaap_AmortizationOfFinancingCosts
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandFourteenSecuredTowerRevenueSecuritiesMember		        
Debt instrument, weighted average interest rate         3.289%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= sbac_TwoThousandFourteenSecuredTowerRevenueSecuritiesMember		        
Weighted average life of debt instrument through the anticipated repayment date         7 years        
2.898% 2014-1C Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 12 months                
Debt instrument, face amount         920,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointEightNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenOneCMember		        
Debt instrument, interest rate, stated percentage 2.898%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointEightNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenOneCMember		       2.898%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointEightNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenOneCMember		        
Repayment date of debt instrument         Oct. 15, 2019        
Debt instrument, maturity date Oct. 15, 2019       Oct. 17, 2044        
Aggregate debt 920,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_TwoPointEightNineEightPercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenOneCMember		                
3.869% 2014-2C Tower Securities [Member]                  
Debt Instrument [Line Items]                  
No prepayment consideration period 18 months                
Debt instrument, face amount         620,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointEightSixNinePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenTwoCMember		        
Debt instrument, interest rate, stated percentage 3.869%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointEightSixNinePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenTwoCMember		       3.869%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointEightSixNinePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenTwoCMember		        
Repayment date of debt instrument         Oct. 15, 2024        
Debt instrument, maturity date Oct. 15, 2024       Oct. 15, 2049        
Aggregate debt 620,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ThreePointEightSixNinePercentSecuredTowerRevenueSecuritiesSeriesTwoThousandFourteenHyphenTwoCMember		                
Revolving Credit Facility [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, maturity date May 09, 2017                
Repayments of revolving credit facility 790,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		       300,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		     390,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		  
Aggregate debt 125,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		 215,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		              
4.0% Convertible Senior Notes [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate, stated percentage 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ConvertibleSeniorNotesFourPointZeroPercentDueTwoThousandFourteenMember		       4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ConvertibleSeniorNotesFourPointZeroPercentDueTwoThousandFourteenMember		       4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= sbac_ConvertibleSeniorNotesFourPointZeroPercentDueTwoThousandFourteenMember
Debt instrument, maturity date Oct. 01, 2014                
Aggregate debt   468,394,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_ConvertibleSeniorNotesFourPointZeroPercentDueTwoThousandFourteenMember		              
Mortgage Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, additional borrowings 860,000,000us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet
/ us-gaap_DebtInstrumentAxis
= sbac_MortgageLoanMember		                
Aggregate debt $ 4,030,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= sbac_MortgageLoanMember		                
Minimum [Member] | Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Additional interest rate for non-compliance 5.00%sbac_AdditionalInterestRateForNonCompliance
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		                
Excess Cash Flow Reserve Minimum [Member] | Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt service coverage ratio 1.30sbac_DebtServiceCoverageRatio
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember
/ us-gaap_RangeAxis
= sbac_ExcessCashFlowReserveMinimumMember		                
Amortization Period Prepay Maximum [Member] | Tower Securities [Member]                  
Debt Instrument [Line Items]                  
Debt service coverage ratio 1.15sbac_DebtServiceCoverageRatio
/ us-gaap_DebtInstrumentAxis
= sbac_SecuredTowerRevenueSecuritiesMember
/ us-gaap_RangeAxis
= sbac_AmortizationPeriodPrepayMaximumMember