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Noncontrolling Interests Common units for Boston Properties Limited Partnership (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Noncontrolling Interest [Line Items] |  |  |  |
Conversion of redeemable partnership units |  | $ 0 |  |
Cumulative effect of a change in accounting principle | $ (2,035) |  |  |
Accumulated other comprehensive loss | (53,161) | (79,748) | $ (52,251) | $ (14,114)
Noncontrolling Interests [Member] |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Conversion of redeemable partnership units | 10,840 | 4,417 |  |
Cumulative effect of a change in accounting principle | (1,763) |  |  |
Boston Properties Limited Partnership |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Cumulative effect of a change in accounting principle | (272) |  |  |
Accumulated other comprehensive loss | (61,867) | (91,532) | $ (60,853) | $ (18,337)
Boston Properties Limited Partnership | Noncontrolling Interests [Member] |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Beginning balance | 2,262,040 | 2,286,689 |  |
Contributions | 31,532 | 31,494 |  |
Net income | 26,933 | 32,771 |  |
Distributions | (26,977) | (23,713) |  |
Conversion of redeemable partnership units | (16,422) | (2,664) |  |
Unearned compensation | (12,344) | (16,617) |  |
Cumulative effect of a change in accounting principle | (1,763) |  |  |
Accumulated other comprehensive loss | (104) | (7,561) |  |
Adjustments to reflect redeemable preferred units at redemption value | (92,740) | 86,626 |  |
Ending balance | $ 2,170,155 | $ 2,387,025 |  |

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