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Stockholders' Equity / Partners' Capital | 12 Months Ended
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Dec. 31, 2015
Equity [Abstract] |
Stockholders' Equity | 12. Stockholders’ Equity / Partners’ Capital Boston Properties, Inc. As of December 31, 2015, Boston Properties, Inc. had 153,579,966 shares of Common Stock outstanding. On June 3, 2014, Boston Properties, Inc. established an “at the market” (ATM) stock offering program through which it may sell from time to time up to an aggregate of $600.0 million of its common stock through sales agents over a three-year period. The Company intends to use the net proceeds from any offering for general business purposes, which may include investment opportunities and debt reduction. No shares of Common Stock have been issued under this ATM stock offering program. During the years ended December 31, 2015 and 2014, Boston Properties, Inc. issued 11,447 and 21,459 shares of Common Stock upon the exercise of options to purchase Common Stock by certain employees. During the years ended December 31, 2015 and 2014, Boston Properties, Inc. issued 424,236 and 80,246 shares of Common Stock, respectively, in connection with the redemption of an equal number of OP Units. The following table presents Boston Properties, Inc.’s dividends per share and Boston Properties Limited Partnership’s distributions per unit for the periods presented:
Record Date |  | Payment Date |  | Dividend (Per Share) |  |  | Distribution (Per Unit) |  |
December 31, 2015 |  | January 28, 2016 |  |  | $1.90 |  | (1) |  | $1.90 |  | (1)
September 30, 2015 |  | October 30, 2015 |  | 0.65 |  |  | 0.65 |  |
June 30, 2015 |  | July 31, 2015 |  | 0.65 |  |  | 0.65 |  |
March 31, 2015 |  | April 30, 2015 |  | 0.65 |  |  | 0.65 |  |
December 31, 2014 |  | January 28, 2015 |  | 5.15 |  | (2) | 5.15 |  | (2)
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(1) | Includes a special dividend/distribution of $1.25 per share/common unit.
(2) | Includes a special dividend/distribution of $4.50 per share/common unit.
Preferred Stock As of December 31, 2015, Boston Properties, Inc. had 80,000 shares (8,000,000 depositary shares each representing 1/100th of a share) outstanding of its 5.25% Series B Cumulative Redeemable Preferred Stock with a liquidation preference of $2,500.00 per share ($25.00 per depositary share). Boston Properties, Inc. contributed the net proceeds of the offering to Boston Properties Limited Partnership in exchange for 80,000 Series B Preferred Units having terms and preferences generally mirroring those of the Series B Preferred Stock. Boston Properties, Inc. pays cumulative cash dividends on the Series B Preferred Stock at a rate of 5.25% per annum of the $2,500.00 liquidation preference per share. Boston Properties, Inc. may not redeem the Series B Preferred Stock prior to March 27, 2018, except in certain circumstances relating to the preservation of Boston Properties, Inc.’s REIT status. On or after March 27, 2018, Boston Properties, Inc., at its option, may redeem the Series B Preferred Stock for a cash redemption price of $2,500.00 per share ($25.00 per depositary share), plus all accrued and unpaid dividends. The Series B Preferred Stock is not redeemable by the holders, has no maturity date and is not convertible into any other security of Boston Properties, Inc. or its affiliates. The following table presents Boston Properties Inc.’s dividends per share on its outstanding Series B Preferred Stock:
Record Date |  | Payment Date |  | Dividend (Per Share) |
February 5, 2016 |  | February 16, 2016 |  |  | $32.8125 |
November 5, 2015 |  | November 16, 2015 |  | 32.8125 |
August 5, 2015 |  | August 17, 2015 |  | 32.8125 |
May 5, 2015 |  | May 15, 2015 |  | 32.8125 |
February 5, 2015 |  | February 17, 2015 |  | 32.8125 |
Boston Properties Limited Partnership The following table presents the changes in the issued and outstanding partners’ capital units since January 1, 2013:
|  | General Partner Units |  | Limited Partner Units |  | Total Partners’ Capital Units
Outstanding at December 31, 2012 |  | 1,689,580 |  |  | 149,911,629 |  |  | 151,601,209 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 50 |  |  | 6,392 |  |  | 6,442 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 207 |  |  | 26,686 |  |  | 26,893 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 7,158 |  |  | 922,283 |  |  | 929,441 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the “at the market” (ATM) stock offering programs |  | 3,227 |  |  | 415,889 |  |  | 419,116 |
Outstanding at December 31, 2013 |  | 1,700,222 |  |  | 151,282,879 |  |  | 152,983,101 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 555 |  |  | 6,409 |  |  | 6,964 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 3,476 |  |  | 40,158 |  |  | 43,634 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 6,391 |  |  | 73,855 |  |  | 80,246 |
Outstanding at December 31, 2014 |  | 1,710,644 |  |  | 151,403,301 |  |  | 153,113,945 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 59 |  |  | 6,140 |  |  | 6,199 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 340 |  |  | 35,246 |  |  | 35,586 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 4,049 |  |  | 420,187 |  |  | 424,236 |
Outstanding at December 31, 2015 |  | 1,715,092 |  |  | 151,864,874 |  |  | 153,579,966 |
As of December 31, 2015, Boston Properties, Inc. owned 1,715,092 general partnership units and 151,864,874 limited partnership units. The following table reflects the activity of the Series B Preferred Units for the years ended December 31, 2015, 2014 and 2013 (in thousands), which activity is included within Boston Properties Limited Partnership’s Consolidated Statements of Partners’ Capital:
Balance at December 31, 2012 | $ | — |
Issuance of Series B Preferred Units | 193,623 |
Net income | 8,057 |
Distributions | (8,057 | )
Balance at December 31, 2013 | 193,623 |
Net income | 10,500 |
Distributions | (10,500 | )
Balance at December 31, 2014 | 193,623 |
Net income | 10,500 |
Distributions | (10,500 | )
Balance at December 31, 2015 | $ | 193,623 |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d),(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C + Details
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