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Consolidated Statements Of Cash Flows - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended | 21 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Sep. 30, 2023
Net income (loss) | $ (103,543) | $ 420,661 | $ 138,269 | $ 864,861 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Depreciation and amortization |  |  | 618,746 | 551,445 |  |
Amortization of right of use assets - operating leases |  |  | 1,502 | 1,843 |  |
Non-cash compensation expense |  |  | 46,699 | 44,208 |  |
Loss (income) from unconsolidated joint ventures | 247,556 | 3,524 | 261,793 | 1,389 |  |
Distributions of net cash flow from operations of unconsolidated joint ventures |  |  | 21,871 | 20,511 |  |
Losses (gains) from investments in securities |  |  | (2,311) | 8,549 |  |
Allowance for current expected credit losses |  |  | 302 | (476) |  |
Non-cash portion of interest expense |  |  | 22,541 | 19,704 |  |
Other Income - assignment fee | 0 | 0 | 0 | (6,624) |  |
Gains on sales of real estate | (517) | (262,345) | (517) | (381,293) |  |
Unrealized gain (loss) on non-real estate investment | 51 | 0 | (332) | 0 |  |
Change in assets and liabilities: |  |  |  |  |  |
Tenant and other receivables, net |  |  | (13,467) | 4,133 |  |
Notes receivable, net |  |  | 0 | (152) |  |
Accrued rental income, net |  |  | (72,190) | (76,268) |  |
Prepaid expenses and other assets |  |  | (76,621) | (46,104) |  |
Right of use assets - operating lease |  |  | (25,640) | 0 |  |
Lease liabilities - operating leases |  |  | 282 | 447 |  |
Accounts payable and accrued expenses |  |  | 40,914 | 3,167 |  |
Accrued interest payable |  |  | 24,648 | (2,900) |  |
Other liabilities |  |  | (6,254) | (35,490) |  |
Tenant leasing costs |  |  | (65,863) | (58,547) |  |
Total adjustments |  |  | 776,103 | 47,542 |  |
Net cash provided by operating activities |  |  | 914,372 | 912,403 |  |
Cash flows from investing activities: |  |  |  |  |  |
Acquisitions of real estate |  |  | 0 | (1,320,273) |  |
Construction in progress |  |  | (361,625) | (384,083) |  |
Building and other capital improvements |  |  | (117,393) | (112,755) |  |
Tenant improvements |  |  | (244,841) | (139,986) |  |
Proceeds from sales of real estate |  |  | 517 | 695,231 |  |
Proceeds from assignment fee |  |  | 0 | 6,624 |  |
Capital contributions to unconsolidated joint ventures |  |  | (148,875) | (109,643) |  |
Capital distributions from unconsolidated joint ventures |  |  | 7,350 | 36,622 |  |
Investment in non-real estate investments |  |  | (1,990) | 0 |  |
Issuance of related party note receivable |  |  | (10,500) | 0 |  |
Proceeds from note receivable |  |  | 0 | 10,000 |  |
Investments in securities, net |  |  | 1,779 | 5,043 |  |
Net cash used in investing activities |  |  | (875,578) | (1,313,220) |  |
Cash flows from financing activities: |  |  |  |  |  |
Proceeds from unsecured senior notes |  |  | 747,727 | 0 |  |
Redemption of unsecured senior notes |  |  | (500,000) | 0 |  |
Borrowings on unsecured line of credit |  |  | 0 | 885,000 |  |
Repayments of unsecured line of credit |  |  | 0 | (690,000) |  |
Borrowings on unsecured term loan |  |  | 1,200,000 | 730,000 |  |
Repayment of unsecured term loan |  |  | (730,000) | 0 |  |
Deferred financing costs |  |  | (12,639) | (2,230) |  |
Net activity from equity transactions |  |  | 367 | (359) |  |
Dividends and distributions |  |  | (514,974) | (513,486) |  |
Contributions from noncontrolling interests in property partnerships | 5,116 |  | 12,671 | 849 |  |
Distributions to noncontrolling interests in property partnerships | (12,150) | (20,150) | (48,370) | (61,229) |  |
Net cash provided by financing activities |  |  | 154,782 | 348,545 |  |
Net increase (decrease) in cash and cash equivalents and cash held in escrows |  |  | 193,576 | (52,272) |  |
Cash and cash equivalents and cash held in escrows, beginning of period |  |  | 736,812 | 501,158 | $ 501,158 | $ 501,158
Cash and cash equivalents and cash held in escrows, end of period | 930,388 | 448,886 | 930,388 | 448,886 | 736,812 | 930,388
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |  |  |  |
Cash and cash equivalents, beginning of period |  |  | 690,333 | 452,692 | 452,692 | 452,692
Cash held in escrows, beginning of period |  |  | 46,479 | 48,466 | 48,466 | 48,466
Cash and cash equivalents, end of period | 882,647 | 375,774 | 882,647 | 375,774 | 690,333 | 882,647
Cash held in escrows,end of period | 47,741 | 73,112 | 47,741 | 73,112 | 46,479 | 47,741
Supplemental disclosures: |  |  |  |  |  |
Cash paid for interest |  |  | 404,016 | 339,067 |  |
Interest capitalized |  |  | 33,426 | 40,048 |  |
Non-cash investing and financing activities: |  |  |  |  |  |
Write-off of fully depreciated real estate |  |  | (111,154) | (95,996) |  |
Change in real estate included in accounts payable and accrued expenses |  |  | 29,435 | 29,290 |  |
Construction in progress, net deconsolidated |  |  | 0 | (11,316) |  |
Investment in unconsolidated joint ventures recorded upon deconsolidation |  |  | 0 | 11,316 |  |
Right-of-use assets obtained in exchange for lease liabilities |  |  | 134,509 | 0 |  |
Other Significant Noncash Transaction, Value of Consideration Received |  |  | 17,519 | 0 |  |
Capitalized operating lease costs |  |  | 5,031 | 0 |  |
Construction in progress from prepaid expenses and other assets |  |  | 25,577 | 0 |  |
Dividends and distributions declared but not paid | 171,916 | 170,952 | 171,916 | 170,952 | 170,643 | 171,916
Conversions of noncontrolling interests to stockholders’ equity |  |  | 3,714 | 6,388 |  |
Issuance of restricted securities to employees and non-employee directors |  |  | 48,121 | 48,605 |  |
Boston Properties Limited Partnership |  |  |  |  |  |
Net income (loss) | (101,787) | 422,379 | 143,569 | 874,091 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Depreciation and amortization |  |  | 613,446 | 546,271 |  |
Amortization of right of use assets - operating leases |  |  | 1,502 | 1,843 |  |
Non-cash compensation expense |  |  | 46,699 | 44,208 |  |
Loss (income) from unconsolidated joint ventures | 247,556 | 3,524 | 261,793 | 1,389 |  |
Distributions of net cash flow from operations of unconsolidated joint ventures |  |  | 21,871 | 20,511 |  |
Losses (gains) from investments in securities |  |  | (2,311) | 8,549 |  |
Allowance for current expected credit losses |  |  | 302 | (476) |  |
Non-cash portion of interest expense |  |  | 22,541 | 19,704 |  |
Other Income - assignment fee | 0 | 0 | 0 | (6,624) |  |
Gains on sales of real estate | (517) | (262,357) | (517) | (385,349) |  |
Unrealized gain (loss) on non-real estate investment | 51 | 0 | (332) | 0 |  |
Change in assets and liabilities: |  |  |  |  |  |
Tenant and other receivables, net |  |  | (13,467) | 4,133 |  |
Notes receivable, net |  |  | 0 | (152) |  |
Accrued rental income, net |  |  | (72,190) | (76,268) |  |
Prepaid expenses and other assets |  |  | (76,621) | (46,104) |  |
Right of use assets - operating lease |  |  | (25,640) | 0 |  |
Lease liabilities - operating leases |  |  | 282 | 447 |  |
Accounts payable and accrued expenses |  |  | 40,914 | 3,167 |  |
Accrued interest payable |  |  | 24,648 | (2,900) |  |
Other liabilities |  |  | (6,254) | (35,490) |  |
Tenant leasing costs |  |  | (65,863) | (58,547) |  |
Total adjustments |  |  | 770,803 | 38,312 |  |
Net cash provided by operating activities |  |  | 914,372 | 912,403 |  |
Cash flows from investing activities: |  |  |  |  |  |
Acquisitions of real estate |  |  | 0 | (1,320,273) |  |
Construction in progress |  |  | (361,625) | (384,083) |  |
Building and other capital improvements |  |  | (117,393) | (112,755) |  |
Tenant improvements |  |  | (244,841) | (139,986) |  |
Proceeds from sales of real estate |  |  | 517 | 695,231 |  |
Proceeds from assignment fee |  |  | 0 | 6,624 |  |
Capital contributions to unconsolidated joint ventures |  |  | (148,875) | (109,643) |  |
Capital distributions from unconsolidated joint ventures |  |  | 7,350 | 36,622 |  |
Investment in non-real estate investments |  |  | (1,990) | 0 |  |
Issuance of related party note receivable |  |  | (10,500) | 0 |  |
Proceeds from note receivable |  |  | 0 | 10,000 |  |
Investments in securities, net |  |  | 1,779 | 5,043 |  |
Net cash used in investing activities |  |  | (875,578) | (1,313,220) |  |
Cash flows from financing activities: |  |  |  |  |  |
Proceeds from unsecured senior notes |  |  | 747,727 | 0 |  |
Redemption of unsecured senior notes |  |  | (500,000) | 0 |  |
Borrowings on unsecured line of credit |  |  | 0 | 885,000 |  |
Repayments of unsecured line of credit |  |  | 0 | (690,000) |  |
Borrowings on unsecured term loan |  |  | 1,200,000 | 730,000 |  |
Repayment of unsecured term loan |  |  | (730,000) | 0 |  |
Deferred financing costs |  |  | (12,639) | (2,230) |  |
Net activity from equity transactions |  |  | 367 | (359) |  |
Dividends and distributions |  |  | (514,974) | (513,486) |  |
Contributions from noncontrolling interests in property partnerships |  |  | 12,671 | 849 |  |
Distributions to noncontrolling interests in property partnerships |  |  | (48,370) | (61,229) |  |
Net cash provided by financing activities |  |  | 154,782 | 348,545 |  |
Net increase (decrease) in cash and cash equivalents and cash held in escrows |  |  | 193,576 | (52,272) |  |
Cash and cash equivalents and cash held in escrows, beginning of period |  |  | 736,812 | 501,158 | 501,158 | 501,158
Cash and cash equivalents and cash held in escrows, end of period | 930,388 | 448,886 | 930,388 | 448,886 | 736,812 | 930,388
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |  |  |  |
Cash and cash equivalents, beginning of period |  |  | 690,333 | 452,692 | 452,692 | 452,692
Cash held in escrows, beginning of period |  |  | 46,479 | 48,466 | 48,466 | 48,466
Cash and cash equivalents, end of period | 882,647 | 375,774 | 882,647 | 375,774 | 690,333 | 882,647
Cash held in escrows,end of period | 47,741 | 73,112 | 47,741 | 73,112 | 46,479 | 47,741
Supplemental disclosures: |  |  |  |  |  |
Cash paid for interest |  |  | 404,016 | 339,067 |  |
Interest capitalized |  |  | 33,426 | 40,048 |  |
Non-cash investing and financing activities: |  |  |  |  |  |
Write-off of fully depreciated real estate |  |  | (109,905) | (95,996) |  |
Change in real estate included in accounts payable and accrued expenses |  |  | 29,435 | 29,290 |  |
Construction in progress, net deconsolidated |  |  | 0 | (11,316) |  |
Investment in unconsolidated joint ventures recorded upon deconsolidation |  |  | 0 | 11,316 |  |
Right-of-use assets obtained in exchange for lease liabilities |  |  | 134,509 | 0 |  |
Other Significant Noncash Transaction, Value of Consideration Received |  |  | 17,519 | 0 |  |
Capitalized operating lease costs |  |  | 5,031 | 0 |  |
Construction in progress from prepaid expenses and other assets |  |  | 25,577 | 0 |  |
Dividends and distributions declared but not paid | $ 171,916 | $ 170,952 | 171,916 | 170,952 | $ 170,643 | $ 171,916
Conversions of noncontrolling interests to stockholders’ equity |  |  | 3,714 | 6,388 |  |
Issuance of restricted securities to employees and non-employee directors |  |  | $ 48,121 | $ 48,605 |  |

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482130/360-10-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-3 + Details
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- Definition The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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