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Derivative and Hedging Instruments (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 17, 2016 USD ($) | Jan. 06, 2016 USD ($) swaps | Dec. 31, 2016 USD ($) yr swaps | Dec. 31, 2015 USD ($) yr | Dec. 31, 2014 USD ($)
Derivative [Line Items] |  |  |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months |  |  | $ (500) |  |
Other liabilities |  |  | (106,022) | $ (34,005) | $ (57,873)
Losses from interest rate contracts |  |  | $ (140) | 0 | 0
Interest Rate Swap [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Notional Amount |  |  |  | $ 950,000 |
Boston Properties Limited Partnership | Interest Rate Swap [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of interest rate swap agreements entered into | swaps |  |  | 17 |  |
Term of anticipated mortgage loan (in years) | yr |  |  | 10 | 10 |
Derivative, Average Fixed Interest Rate |  |  |  | 2.423% |
Derivative, Notional Amount |  |  |  | $ 550,000 |
Maximum period of hedging exposure to the variability in future cash flows for forecasted transactions (in years) | yr |  |  | 10 |  |
767 Fifth Partners LLC [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Ownership Percentage by Parent |  |  | 60.00% |  |
767 Fifth Partners LLC [Member] | Interest Rate Swap [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of interest rate swap agreements entered into | swaps |  | 2 | 16 |  |
Term of anticipated mortgage loan (in years) | yr |  |  | 10 |  |
Derivative, Average Fixed Interest Rate |  |  | 2.619% |  |
Derivative, Notional Amount |  | $ 50,000 | $ 450,000 | 400,000 |
Maximum period of hedging exposure to the variability in future cash flows for forecasted transactions (in years) | yr |  |  | 10 |  |
Derivative, Net Liability Position, Aggregate Fair Value |  |  | $ 8,700 |  |
Assets Needed for Immediate Settlement, Aggregate Fair Value |  |  | 8,700 |  |
Derivative Instruments, Loss Recognized in Other Liabilities |  |  | 8,800 |  |
Derivative Instruments, Gain Recognized in Prepaid Expenses and Other Assets |  |  | 500 |  |
Boston Properties Limited Partnership |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Other liabilities |  |  | (106,022) | (34,005) | (57,873)
Losses from interest rate contracts |  |  | $ (140) | $ 0 | $ 0
Boston Properties Limited Partnership | Interest Rate Swap [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Other liabilities | $ 49,300 |  |  |  |
Losses from interest rate contracts | (100) |  |  |  |
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion | 49,200 |  |  |  |
Derivative instrument, yearly amount reclassed to interest expense | $ 4,900 |  |  |  |
Unsecured Senior Note 3.495% | Senior Notes [Member] | Boston Properties Limited Partnership |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Coupon/Stated Rate | 2.75% |  | 2.75% |  |

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