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Consolidated Statements Of Cash Flows $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Net income | $ 1,020,584 | $ 631,932 | $ 1,018,691
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 749,775 | 717,336 | 683,751
Amortization of right of use assets - operating leases | 2,427 | 3,516 | 2,234
Non-cash compensation expense | 52,026 | 50,860 | 44,142
Loss from unconsolidated joint ventures | 59,840 | 2,570 | 85,110
Distributions of net cash flow from operations of unconsolidated joint ventures | 26,827 | 21,542 | 31,892
Losses (gains) from investments in securities | 6,453 | (5,626) | (5,261)
Allowance for current expected credit losses | (224) | (1,207) | 1,849
Non-cash portion of interest expense | 25,831 | 23,368 | 23,384
Settlement of accreted debt discount on redemption of unsecured senior notes | 0 | (8,500) | 0
Losses from early extinguishment of debt | 0 | 45,182 | 0
Other Income - assignment fee | 6,624 | 0 | 0
Gains on sales of real estate | (437,019) | (123,660) | (618,982)
Gain on sales-type lease | (10,058) | 0 | 0
Unrealized loss on non-real estate investment | 150 | 0 | 0
Change in assets and liabilities: |  |  |
Tenant and other receivables, net | (7,621) | 4,820 | 22,550
Notes receivable, net | (152) | (545) | (19)
Accrued rental income, net | (98,075) | (101,548) | (97,099)
Prepaid expenses and other assets | 20,099 | (20,811) | 12,488
Lease liabilities - finance leases | 0 | 0 | 568
Lease liabilities - operating leases | 125 | (23,599) | 1,533
Accounts payable and accrued expenses | (22,777) | 20,025 | (4,059)
Accrued interest payable | 8,989 | (10,839) | 16,211
Other liabilities | (24,120) | (28,739) | 17,629
Tenant leasing costs | (84,057) | (62,850) | (79,772)
Total adjustments | 261,815 | 501,295 | 138,149
Net cash provided by operating activities | 1,282,399 | 1,133,227 | 1,156,840
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (1,320,273) | (222,260) | (137,976)
Construction in progress | (500,273) | (513,878) | (482,507)
Building and other capital improvements | (177,004) | (150,998) | (160,126)
Tenant improvements | (218,685) | (263,952) | (234,423)
Proceeds from sales of real estate | 834,770 | 179,887 | 519,303
Proceeds from assignment fee | 6,624 | 0 | 0
Capital contributions to unconsolidated joint ventures | (277,581) | (98,152) | (172,436)
Capital distributions from unconsolidated joint ventures | 37,122 | 122 | 55,298
Proceeds from sale of investment in unconsolidated joint venture | 0 | 17,789 | 0
Investments in non-real estate investments | (2,404) | 0 | 0
Issuance of notes receivable, net | 0 | 0 | (9,800)
Proceeds from note receivable | 10,000 | 10,035 | 6,397
Investments in securities, net | 4,902 | 1,451 | 2,551
Net cash used in investing activities | (1,602,802) | (1,039,956) | (613,719)
Cash flows from financing activities: |  |  |
Proceeds from Secured Notes Payable | 0 | 1,201,388 | 0
Repayments of mortgage notes payable | 0 | (832,296) | (17,168)
Proceeds from unsecured senior notes | 749,557 | 1,695,996 | 1,248,125
Redemption of unsecured senior notes | 0 | (1,841,500) | 0
Borrowings on unsecured line of credit | 985,000 | 770,000 | 265,000
Repayments of unsecured line of credit | (1,130,000) | (625,000) | (265,000)
Borrowings on unsecured term loan | 730,000 | 0 | 0
Redemption of preferred stock | 0 | (200,000) | 0
Payments on finance lease obligations | 0 | 1,250 | 0
Repayment of unsecured term loan | 0 | (500,000) | 0
Deferred financing costs | (8,460) | (20,757) | (10,416)
Debt Issuance Costs | 0 | (16,186) | 0
Debt prepayment and extinguishment costs | 0 | (43,036) | 0
Net activity from equity transactions | (352) | 24,214 | 3,277
Dividends and distributions | (685,019) | (683,753) | (688,904)
Contributions from noncontrolling interests in property partnerships | 849 | 18,002 | 8,219
Distributions to noncontrolling interests in property partnerships | (85,518) | (259,764) | (58,811)
Net cash provided by (used in) financing activities | 556,057 | (1,311,442) | 484,322
Net increase (decrease) in cash and cash equivalents and cash held in escrows | 235,654 | (1,218,171) | 1,027,443
Cash and cash equivalents and cash held in escrows, beginning of period | 501,158 | 1,719,329 | 691,886
Cash and cash equivalents and cash held in escrows, end of period | 736,812 | 501,158 | 1,719,329
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |
Cash and cash equivalents, beginning of period | 452,692 | 1,668,742 | 644,950
Cash held in escrows, beginning of period | 48,466 | 50,587 | 46,936
Cash and cash equivalents, end of period | 690,333 | 452,692 | 1,668,742
Cash held in escrows,end of period | 46,479 | 48,466 | 50,587
Supplemental disclosures: |  |  |
Cash paid for interest | 449,903 | 465,442 | 433,492
Interest capitalized | 52,130 | 53,097 | 53,881
Non-cash investing and financing activities: |  |  |
Write-off of fully depreciated real estate | (119,534) | (239,317) | (99,494)
Change in real estate included in accounts payable and accrued expenses | 97,586 | (25,183) | (19,848)
Construction in progress, net deconsolidated | (11,316) | (299,947) | 0
Investment in unconsolidated joint ventures recorded upon deconsolidation | 11,316 | 107,132 | 347,898
Sales-type lease origination | 13,045 | 0 | 0
Derecognition of assets in exchange for sales-type lease obligation | (2,987) | 0 | 0
Accrued rental income, net deconsolidated | 0 | 0 | (4,558)
Tenant leasing costs, net deconsolidated | 0 | 0 | (3,462)
Building and other capital improvements, net deconsolidated | 0 | 0 | (111,889)
Tenant improvements, net deconsolidated | 0 | 0 | (12,331)
Prepaid expenses and other assets, net deconsolidated | 0 | (5,011) | 0
Assumption of mortgage notes payable | 0 | 200,311 | 0
Mortgage notes payable, net deconsolidation | 0 | (198,381) | 0
Issuance of operating partnership units | 0 | 99,689 | 0
Right-of-use assets obtained in exchange for lease liabilities | 0 | 26,887 | 0
Dividends and distributions declared but not paid | 170,643 | 169,859 | 171,082
Conversions of noncontrolling interests to stockholders’ equity | 6,539 | 18,386 | 29,698
Issuance of restricted securities to employees and non-employee directors | 48,417 | 44,405 | 42,607
Boston Properties Limited Partnership |  |  |
Net income | 1,032,122 | 641,771 | 1,038,739
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 742,293 | 709,035 | 676,666
Amortization of right of use assets - operating leases | 2,427 | 3,516 | 2,234
Non-cash compensation expense | 52,026 | 50,860 | 44,142
Loss from unconsolidated joint ventures | 59,840 | 2,570 | 85,110
Distributions of net cash flow from operations of unconsolidated joint ventures | 26,827 | 21,542 | 31,892
Losses (gains) from investments in securities | 6,453 | (5,626) | (5,261)
Allowance for current expected credit losses | (224) | (1,207) | 1,849
Non-cash portion of interest expense | 25,831 | 23,368 | 23,384
Settlement of accreted debt discount on redemption of unsecured senior notes | 0 | (8,500) | 0
Losses from early extinguishment of debt | 0 | 45,182 | 0
Other Income - assignment fee | 6,624 | 0 | 0
Gains on sales of real estate | (441,075) | (125,198) | (631,945)
Gain on sales-type lease | (10,058) | 0 | 0
Unrealized loss on non-real estate investment | 150 | 0 | 0
Change in assets and liabilities: |  |  |
Tenant and other receivables, net | (7,621) | 4,820 | 22,550
Notes receivable, net | (152) | (545) | (19)
Accrued rental income, net | (98,075) | (101,548) | (97,099)
Prepaid expenses and other assets | 20,099 | (20,811) | 12,488
Lease liabilities - finance leases | 0 | 0 | 568
Lease liabilities - operating leases | 125 | (23,599) | 1,533
Accounts payable and accrued expenses | (22,777) | 20,025 | (4,059)
Accrued interest payable | 8,989 | (10,839) | 16,211
Other liabilities | (24,120) | (28,739) | 17,629
Tenant leasing costs | (84,057) | (62,850) | (79,772)
Total adjustments | 250,277 | 491,456 | 118,101
Net cash provided by operating activities | 1,282,399 | 1,133,227 | 1,156,840
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (1,320,273) | (222,260) | (137,976)
Construction in progress | (500,273) | (513,878) | (482,507)
Building and other capital improvements | (177,004) | (150,998) | (160,126)
Tenant improvements | (218,685) | (263,952) | (234,423)
Proceeds from sales of real estate | 834,770 | 179,887 | 519,303
Proceeds from assignment fee | 6,624 | 0 | 0
Capital contributions to unconsolidated joint ventures | (277,581) | (98,152) | (172,436)
Capital distributions from unconsolidated joint ventures | 37,122 | 122 | 55,298
Proceeds from sale of investment in unconsolidated joint venture | 0 | 17,789 | 0
Investments in non-real estate investments | (2,404) | 0 | 0
Issuance of notes receivable, net | 0 | 0 | (9,800)
Proceeds from note receivable | 10,000 | 10,035 | 6,397
Investments in securities, net | 4,902 | 1,451 | 2,551
Net cash used in investing activities | (1,602,802) | (1,039,956) | (613,719)
Cash flows from financing activities: |  |  |
Proceeds from Secured Notes Payable | 0 | 1,201,388 | 0
Repayments of mortgage notes payable | 0 | (832,296) | (17,168)
Proceeds from unsecured senior notes | 749,557 | 1,695,996 | 1,248,125
Redemption of unsecured senior notes | 0 | (1,841,500) | 0
Borrowings on unsecured line of credit | 985,000 | 770,000 | 265,000
Repayments of unsecured line of credit | (1,130,000) | (625,000) | (265,000)
Borrowings on unsecured term loan | 730,000 | 0 | 0
Redemption of preferred stock | 0 | (200,000) | 0
Payments on finance lease obligations | 0 | 1,250 | 0
Repayment of unsecured term loan | 0 | (500,000) | 0
Deferred financing costs | (8,460) | (20,757) | (10,416)
Debt Issuance Costs | 0 | (16,186) | 0
Debt prepayment and extinguishment costs | 0 | (43,036) | 0
Net activity from equity transactions | (352) | 24,214 | 3,277
Dividends and distributions | (685,019) | (683,753) | (688,904)
Contributions from noncontrolling interests in property partnerships | 849 | 18,002 | 8,219
Distributions to noncontrolling interests in property partnerships | (85,518) | (259,764) | (58,811)
Net cash provided by (used in) financing activities | 556,057 | (1,311,442) | 484,322
Net increase (decrease) in cash and cash equivalents and cash held in escrows | 235,654 | (1,218,171) | 1,027,443
Cash and cash equivalents and cash held in escrows, beginning of period | 501,158 | 1,719,329 | 691,886
Cash and cash equivalents and cash held in escrows, end of period | 736,812 | 501,158 | 1,719,329
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |
Cash and cash equivalents, beginning of period | 452,692 | 1,668,742 | 644,950
Cash held in escrows, beginning of period | 48,466 | 50,587 | 46,936
Cash and cash equivalents, end of period | 690,333 | 452,692 | 1,668,742
Cash held in escrows,end of period | 46,479 | 48,466 | 50,587
Supplemental disclosures: |  |  |
Cash paid for interest | 449,903 | 465,442 | 433,492
Interest capitalized | 52,130 | 53,097 | 53,881
Non-cash investing and financing activities: |  |  |
Write-off of fully depreciated real estate | (119,534) | (238,003) | (99,494)
Change in real estate included in accounts payable and accrued expenses | 97,586 | (25,183) | (19,848)
Construction in progress, net deconsolidated | (11,316) | (299,947) | 0
Investment in unconsolidated joint ventures recorded upon deconsolidation | 11,316 | 107,132 | 347,898
Sales-type lease origination | 13,045 | 0 | 0
Derecognition of assets in exchange for sales-type lease obligation | (2,987) | 0 | 0
Accrued rental income, net deconsolidated | 0 | 0 | (4,558)
Tenant leasing costs, net deconsolidated | 0 | 0 | (3,462)
Building and other capital improvements, net deconsolidated | 0 | 0 | (111,889)
Tenant improvements, net deconsolidated | 0 | 0 | (12,331)
Prepaid expenses and other assets, net deconsolidated | 0 | (5,011) | 0
Assumption of mortgage notes payable | 0 | 200,311 | 0
Mortgage notes payable, net deconsolidation | 0 | (198,381) | 0
Issuance of operating partnership units | 0 | 99,689 | 0
Right-of-use assets obtained in exchange for operating lease liabilities | 0 | 26,887 | 0
Dividends and distributions declared but not paid | 170,643 | 169,859 | 171,082
Conversions of noncontrolling interests to stockholders’ equity | 6,539 | 18,386 | 29,698
Issuance of restricted securities to employees and non-employee directors | $ 48,417 | $ 44,405 | $ 42,607

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585 + Details
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- Definition The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586 + Details
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- Definition The cash outflow from the acquisition of a piece of land and anything permanently fixed to it, including buildings, structures on it and so forth, and payments to develop real estate assets by adding improvements on or to a parcel of land. Such improvements may include drainage, utilities, subdividing, access, buildings, and any combination of these elements. Including real estate intended to generate income for the owner; excluding real estate acquired for use by the owner. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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