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Unsecured Senior Notes Schedule of Unsecured Senior Notes (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Aug. 17, 2016
Jan. 20, 2016
Dec. 31, 2015
Debt Instrument [Line Items]        
Total $ 7,243,767     $ 5,264,819
Boston Properties Limited Partnership        
Debt Instrument [Line Items]        
Total 7,243,767     $ 5,264,819
Boston Properties Limited Partnership | Senior Notes [Member]        
Debt Instrument [Line Items]        
Principal Amount 7,300,000      
Net unamortized discount (19,429)      
Deferred Finance Costs, Net (36,804)      
Total $ 7,243,767      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 5.967%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 5.875%      
Effective Rate [1] 5.967%      
Principal Amount $ 700,000      
Maturity Date [2] Oct. 15, 2019      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 5.708%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 5.625%      
Effective Rate [1] 5.708%      
Principal Amount $ 700,000      
Maturity Date [2] Nov. 15, 2020      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 4.289%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 4.125%      
Effective Rate [1] 4.289%      
Principal Amount $ 850,000      
Maturity Date [2] May 15, 2021      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.853%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 3.70%      
Effective Rate [1] 3.853%      
Principal Amount $ 850,000      
Maturity Date [2] Nov. 15, 2018      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.954%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 3.85%      
Effective Rate [1] 3.954%      
Principal Amount $ 1,000,000      
Maturity Date [2] Feb. 01, 2023      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.279%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 3.125%      
Effective Rate [1] 3.279%      
Principal Amount $ 500,000      
Maturity Date [2] Sep. 01, 2023      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.916%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 3.80%      
Effective Rate [1] 3.916%      
Principal Amount $ 700,000      
Maturity Date [2] Feb. 01, 2024      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.766%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 3.65%   3.65%  
Effective Rate 3.766% [1]   3.766%  
Principal Amount $ 1,000,000   $ 1,000,000  
Maturity Date [2] Feb. 01, 2026      
Boston Properties Limited Partnership | Senior Notes [Member] | Unsecured Senior Notes 3.495%        
Debt Instrument [Line Items]        
Coupon/Stated Rate 2.75% 2.75%    
Effective Rate 3.495% [1] 3.495%    
Principal Amount $ 1,000,000 $ 1,000,000    
Maturity Date [2] Oct. 01, 2026      
[1] Yield on issuance date including the effects of discounts on the notes, settlements of interest rate contracts and the amortization of financing costs.
[2] No principal amounts are due prior to maturity.