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Noncontrolling Interests Redeemable common units of Boston Properties Limited Partnership (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Noncontrolling Interest [Line Items] |  |  |
Conversion of redeemable partnership units | $ 0 | $ 0 | $ 0
Adjustment to reflect redeemable partnership units at redemption value | 5,128 | 11,686 | 8,475
Boston Properties Limited Partnership [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Beginning Balance | 2,310,046 | 1,710,218 | 1,836,522
Contributions | 39,030 | 23,990 | 26,398
Net income | 66,951 | 50,862 | 84,236
Distributions | (69,447) | (126,948) | (83,448)
Conversion of redeemable partnership units | (14,343) | (2,700) | (30,291)
Unearned compensation | (4,579) | (2,813) | 1,472
Other comprehensive income (loss) | (554) | 256 | 252
Adjustment to reflect redeemable partnership units at redemption value | (40,415) | 657,181 | (124,923)
Ending Balance | $ 2,286,689 | $ 2,310,046 | $ 1,710,218

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