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Derivative Instruments and Hedging Activities (Details)
$ in Thousands
3 Months Ended
Jan. 06, 2016
USD ($)
swaps
Mar. 31, 2016
USD ($)
yr
swaps
Dec. 31, 2015
USD ($)
Interest Rate Swap [Member]      
Debt Instrument [Line Items]      
Derivative, Net Liability Position, Aggregate Fair Value   $ 69,300  
Assets Needed for Immediate Settlement, Aggregate Fair Value   69,300  
Amount of loss related to the effective portion recognized in other comprehensive loss   68,900  
Notional Amount   1,000,000 $ 950,000
Estimated current balance held in Accumulated Other Comprehensive Loss to be reclassified into earnings within the next twelve months   $ (2,100)  
Boston Properties Limited Partnership | Interest Rate Swap [Member]      
Debt Instrument [Line Items]      
Number of interest rate swap agreements entered into (swap contracts) | swaps   17  
Term of anticipated mortgage loan (in years) | yr   10  
Maximum period of hedging exposure to the variability in future cash flows for forecasted transactions (in years) | yr   10  
Average Fixed Interest Rate   2.423%  
Notional Amount   $ 550,000 550,000
767 Fifth Partners LLC [Member]      
Debt Instrument [Line Items]      
Ownership Percentage by the Company   60.00%  
767 Fifth Partners LLC [Member] | Interest Rate Swap [Member]      
Debt Instrument [Line Items]      
Number of interest rate swap agreements entered into (swap contracts) | swaps 2 16  
Term of anticipated mortgage loan (in years) | yr   10  
Maximum period of hedging exposure to the variability in future cash flows for forecasted transactions (in years) | yr   10  
Average Fixed Interest Rate   2.619%  
Notional Amount $ 50,000 $ 450,000 $ 400,000