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Consolidated Statements Of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Net income | $ 569,977 | $ 799,918 | $ 526,057
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 694,403 | 639,542 | 628,573
Impairment loss | 1,783 | 0 | 0
Non-cash compensation expense | 32,911 | 29,183 | 28,099
Income from unconsolidated joint ventures | (8,074) | (22,770) | (12,769)
Gain on sale of investment in unconsolidated joint venture | (59,370) | 0 | 0
Distributions of net cash flow from operations of unconsolidated joint ventures | 24,955 | 8,469 | 7,372
Losses (gains) on investments in securities | (2,273) | 653 | (1,038)
Non-cash portion of interest expense | (35,052) | (42,271) | (39,343)
Settlement of accreted debt discount on repurchases/repayments of unsecured senior notes and unsecured exchangeable senior notes | 0 | 0 | (94,963)
Losses from early extinguishments of debt | 371 | 21,837 | 0
Gains on sales of real estate | (80,606) | (375,895) | (168,039)
Change in assets and liabilities: |  |  |
Cash held in escrows | 2,277 | (18,284) | 3,433
Tenant and other receivables, net | 3,688 | (46,326) | 12,869
Accrued rental income, net | (28,127) | (73,911) | (57,899)
Prepaid expenses and other assets | 52,923 | (16,877) | 20,238
Accounts payable and accrued expenses | 15,666 | (6,310) | 3,903
Accrued interest payable | 53,547 | 26,854 | (3,991)
Other liabilities | (106,022) | (34,005) | (57,873)
Tenant leasing costs | (96,103) | (90,396) | (99,076)
Total adjustments | 466,897 | (507) | 169,496
Net cash provided by operating activities | 1,036,874 | 799,411 | 695,553
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (78,000) | 0 | (4,670)
Construction in progress | (500,350) | (374,664) | (405,942)
Building and other capital improvements | (150,640) | (112,755) | (82,479)
Tenant improvements | (230,298) | (144,572) | (106,003)
Proceeds from sales of real estate | 122,750 | 602,600 | 419,864
Proceeds from sales of real estate and sales of interests in property partnerships placed in escrow | (122,647) | (200,612) | (1,912,347)
Proceeds from sales of real estate and sales of interests in property partnerships released from escrow | 122,647 | 634,165 | 1,478,794
Cash placed in escrow for land sale contracts | 0 | (7,111) | 0
Cash released from scrow for land sale contracts | 1,596 | 5,312 | 0
Cash released from escrow for investing activities | 6,694 | 0 | 0
Capital contributions to unconsolidated joint ventures | (575,795) | (38,207) | (52,052)
Capital distributions from unconsolidated joint ventures | 20,440 | 24,527 | 1,491
Proceeds from sale of investment in unconsolidated joint venture | 55,707 | 0 | 0
Investments in marketable securities | 0 | (667,335) | 0
Investments in securities, net | (1,161) | (1,574) | (1,780)
Net cash used in investing activities | (1,329,057) | (280,226) | (665,124)
Cash flows from financing activities: |  |  |
Repayments of mortgage notes payable | (1,326,865) | (54,801) | (87,758)
Proceeds from unsecured senior notes | 1,989,790 | 0 | 0
Redemption/repurchase of unsecured senior notes | 0 | 0 | (548,016)
Redemption/repurchase of unsecured exchangeable senior notes | 0 | 0 | (654,521)
Borrowings on unsecured line of credit | 25,000 | 0 | 0
Repayments of unsecured line of credit | (25,000) | 0 | 0
Payments on capital lease obligations | (745) | (356) | 0
Proceeds from real estate financing transaction | 0 | 6,000 | 14,523
Payments on real estate financing transactions | (5,260) | (3,103) | (234)
Deferred financing costs | (16,121) | (1,510) | (31)
Net proceeds from equity transactions | (271) | 799 | 1,923
Redemption of preferred units | 0 | (633) | (17,373)
Dividends and distributions | (671,626) | (1,226,199) | (840,264)
Sales of interests in property partnerships and contributions from noncontrolling interests in property partnerships | 11,951 | 2,705 | 1,536,382
Acquisition of noncontrolling interest in property partnership | 0 | (108,499) | 0
Distributions to noncontrolling interest in property partnerships | (55,474) | (172,949) | (37,118)
Net cash used in financing activities | (74,621) | (1,558,546) | (632,487)
Net decrease in cash and cash equivalents | (366,804) | (1,039,361) | (602,058)
Cash and cash equivalents, beginning of year | 723,718 | 1,763,079 | 2,365,137
Cash and cash equivalents, end of year | 356,914 | 723,718 | 1,763,079
Supplemental disclosures: |  |  |
Cash paid for interest | 433,591 | 481,826 | 646,516
Interest capitalized | 39,237 | 34,213 | 52,476
Non-cash investing and financing activities: |  |  |
Write off of fully depreciated real estate | (206,721) | (45,455) | (46,943)
Change in real estate included in accounts payable and accrued expenses | (1,481) | 74,985 | (1,431)
Real estate acquired through capital lease | 21,000 | 0 | 0
Marketable securities transferred in connection with the legal defeasance of mortgage note payable | 0 | 667,335 | 0
Mortgage note payable legally defeased | 0 | 640,500 | 0
Mortgage note payable assigned in connection with the sale of real estate | 0 | 116,993 | 0
Dividends and distributions declared but not paid | 130,308 | 327,320 | 882,472
Conversions of redeemable partnership units to partners’ capital / stockholders equity | 6,461 | 14,343 | 2,700
Conversion of redeemable preferred units to common units | 0 | 0 | 33,306
Issuance of restricted securities to employees and directors | 33,615 | 43,355 | 27,445
Boston Properties Limited Partnership |  |  |
Net income | 583,773 | 809,109 | 541,213
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 682,776 | 631,549 | 620,064
Impairment loss | 1,783 | 0 | 0
Non-cash compensation expense | 32,911 | 29,183 | 28,099
Income from unconsolidated joint ventures | (8,074) | (22,770) | (12,769)
Gain on sale of investment in unconsolidated joint venture | (59,370) | 0 | 0
Distributions of net cash flow from operations of unconsolidated joint ventures | 24,955 | 8,469 | 7,372
Losses (gains) on investments in securities | (2,273) | 653 | (1,038)
Non-cash portion of interest expense | (35,052) | (42,271) | (39,343)
Settlement of accreted debt discount on repurchases/repayments of unsecured senior notes and unsecured exchangeable senior notes | 0 | 0 | (94,963)
Losses from early extinguishments of debt | 371 | 21,837 | 0
Gains on sales of real estate | (82,775) | (377,093) | (174,686)
Change in assets and liabilities: |  |  |
Cash held in escrows | 2,277 | (18,284) | 3,433
Tenant and other receivables, net | 3,688 | (46,326) | 12,869
Accrued rental income, net | (28,127) | (73,911) | (57,899)
Prepaid expenses and other assets | 52,923 | (16,877) | 20,238
Accounts payable and accrued expenses | 15,666 | (6,310) | 3,903
Accrued interest payable | 53,547 | 26,854 | (3,991)
Other liabilities | (106,022) | (34,005) | (57,873)
Tenant leasing costs | (96,103) | (90,396) | (99,076)
Total adjustments | 453,101 | (9,698) | 154,340
Net cash provided by operating activities | 1,036,874 | 799,411 | 695,553
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (78,000) | 0 | (4,670)
Construction in progress | (500,350) | (374,664) | (405,942)
Building and other capital improvements | (150,640) | (112,755) | (82,479)
Tenant improvements | (230,298) | (144,572) | (106,003)
Proceeds from sales of real estate | 122,750 | 602,600 | 419,864
Proceeds from sales of real estate and sales of interests in property partnerships placed in escrow | (122,647) | (200,612) | (1,912,347)
Proceeds from sales of real estate and sales of interests in property partnerships released from escrow | 122,647 | 634,165 | 1,478,794
Cash placed in escrow for land sale contracts | 0 | (7,111) | 0
Cash released from scrow for land sale contracts | 1,596 | 5,312 | 0
Cash released from escrow for investing activities | 6,694 | 0 | 0
Capital contributions to unconsolidated joint ventures | (575,795) | (38,207) | (52,052)
Capital distributions from unconsolidated joint ventures | 20,440 | 24,527 | 1,491
Proceeds from sale of investment in unconsolidated joint venture | 55,707 | 0 | 0
Investments in marketable securities | 0 | (667,335) | 0
Investments in securities, net | (1,161) | (1,574) | (1,780)
Net cash used in investing activities | (1,329,057) | (280,226) | (665,124)
Cash flows from financing activities: |  |  |
Repayments of mortgage notes payable | (1,326,865) | (54,801) | (87,758)
Proceeds from unsecured senior notes | 1,989,790 | 0 | 0
Redemption/repurchase of unsecured senior notes | 0 | 0 | (548,016)
Redemption/repurchase of unsecured exchangeable senior notes | 0 | 0 | (654,521)
Borrowings on unsecured line of credit | 25,000 | 0 | 0
Repayments of unsecured line of credit | (25,000) | 0 | 0
Payments on capital lease obligations | (745) | (356) | 0
Proceeds from real estate financing transaction | 0 | 6,000 | 14,523
Payments on real estate financing transactions | (5,260) | (3,103) | (234)
Deferred financing costs | (16,121) | (1,510) | (31)
Net proceeds from equity transactions | (271) | 799 | 1,923
Redemption of preferred units | 0 | (633) | (17,373)
Dividends and distributions | (671,626) | (1,226,199) | (840,264)
Sales of interests in property partnerships and contributions from noncontrolling interests in property partnerships | 11,951 | 2,705 | 1,536,382
Acquisition of noncontrolling interest in property partnership | 0 | (108,499) | 0
Distributions to noncontrolling interest in property partnerships | (55,474) | (172,949) | (37,118)
Net cash used in financing activities | (74,621) | (1,558,546) | (632,487)
Net decrease in cash and cash equivalents | (366,804) | (1,039,361) | (602,058)
Cash and cash equivalents, beginning of year | 723,718 | 1,763,079 | 2,365,137
Cash and cash equivalents, end of year | 356,914 | 723,718 | 1,763,079
Supplemental disclosures: |  |  |
Cash paid for interest | 433,591 | 481,826 | 646,516
Interest capitalized | 39,237 | 34,213 | 52,476
Non-cash investing and financing activities: |  |  |
Write off of fully depreciated real estate | (202,388) | (45,455) | (46,419)
Change in real estate included in accounts payable and accrued expenses | (1,481) | 74,985 | (1,431)
Real estate acquired through capital lease | 21,000 | 0 | 0
Marketable securities transferred in connection with the legal defeasance of mortgage note payable | 0 | 667,335 | 0
Mortgage note payable legally defeased | 0 | 640,500 | 0
Mortgage note payable assigned in connection with the sale of real estate | 0 | 116,993 | 0
Dividends and distributions declared but not paid | 130,308 | 327,320 | 882,472
Conversions of redeemable partnership units to partners’ capital / stockholders equity | 6,461 | 14,343 | 2,700
Conversion of redeemable preferred units to common units | 0 | 0 | 33,306
Issuance of restricted securities to employees and directors | $ 33,615 | $ 43,355 | $ 27,445

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows, for example, deferred expenses, intangible assets, or income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The value of notes retired (or transferred to another entity) in noncash investing or financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: 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.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition Difference between actual rental income due and rental income recognized on a straight-line basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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