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v3.19.2

Unsecured Senior Notes (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 21, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Total |  | $ 8,390,708 |  | $ 7,544,697
Boston Properties Limited Partnership |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  | 8,390,708 |  | $ 7,544,697
Boston Properties Limited Partnership | Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Gross |  | 8,450,000 |  |
Net unamortized discount |  | 18,802 |  |
Deferred financing costs, net |  | 40,490 |  |
Total |  | $ 8,390,708 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 5.708% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.625% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 5.708% |  |
Long-term Debt, Gross |  | $ 700,000 |  |
Debt Instrument, Maturity Date | [2] | Nov. 15, 2020 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 4.289% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.125% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 4.289% |  |
Long-term Debt, Gross |  | $ 850,000 |  |
Debt Instrument, Maturity Date | [2] | May 15, 2021 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 11 Year Unsecured Senior Notes 3.954%[Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.85% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.954% |  |
Long-term Debt, Gross |  | $ 1,000,000 |  |
Debt Instrument, Maturity Date | [2] | Feb. 01, 2023 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10.5 year Unsecured Senior Notes 3.279% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.125% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.279% |  |
Long-term Debt, Gross |  | $ 500,000 |  |
Debt Instrument, Maturity Date | [2] | Sep. 01, 2023 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10.5 Year Unsecured Senior Notes 3.916%[Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.80% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.916% |  |
Long-term Debt, Gross |  | $ 700,000 |  |
Debt Instrument, Maturity Date | [2] | Feb. 01, 2024 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 7 Year Unsecured Senior Notes 3.350% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.20% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.35% |  |
Long-term Debt, Gross |  | $ 850,000 |  |
Debt Instrument, Maturity Date | [2] | Jan. 15, 2025 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 3.766%[Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.65% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.766% |  |
Long-term Debt, Gross |  | $ 1,000,000 |  |
Debt Instrument, Maturity Date | [2] | Feb. 01, 2026 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 3.495% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.75% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.495% |  |
Long-term Debt, Gross |  | $ 1,000,000 |  |
Debt Instrument, Maturity Date | [2] | Oct. 01, 2026 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 4.628%[Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.50% |  |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 4.628% |  |
Long-term Debt, Gross |  | $ 1,000,000 |  |
Debt Instrument, Maturity Date | [2] | Dec. 01, 2028 |  |
Boston Properties Limited Partnership | Senior Notes [Member] | 10 Year Unsecured Senior Notes 3.505% [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.40% | 3.40% |
Debt Instrument, Interest Rate, Effective Percentage | [1] | 3.505% | 3.505% |
Long-term Debt, Gross |  | $ 850,000 | $ 850,000 |
Debt Instrument, Maturity Date | [2] | Jun. 21, 2029 |  |
[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.

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