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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Activities |  |  |  |
Net income |  | $ 291,487 | $ 270,856 | $ 101,069
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation and amortization |  | 284,011 | 289,899 | 418,798
Equity in net loss (income) from unconsolidated joint ventures |  | 34,518 | (7,311) | (21,892)
Distributions of cumulative earnings from unconsolidated joint ventures |  | 864 | 10,277 | 20,309
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate |  | (76,181) | (303,967) | (16,166)
Purchase price and other fair value adjustments |  | (69,389) | (57,385) | 0
Depreciable real estate reserves and impairment |  | 7,047 | 227,543 | 178,520
Loss (gain) on sale of real estate, net |  | 16,749 | 30,757 | (73,241)
Loan loss reserves and other investment reserves, net of recoveries |  | 0 | 6,839 | 0
Gain on sale of investments in marketable securities |  | 0 | 0 | (3,262)
Loss on early extinguishment of debt |  | 0 | 17,083 | 0
Deferred rents receivable |  | (13,941) | (18,216) | (38,009)
Non-cash lease expense |  | 13,744 | 2,016 | 1,020
Other non-cash adjustments |  | 271 | 2,932 | 19,621
Changes in operating assets and liabilities: |  |  |  |
Tenant and other receivables |  | (4,968) | 6,968 | (5,717)
Related party receivables |  | 7,802 | (1,044) | (7,209)
Deferred lease costs |  | (70,938) | (44,158) | (41,939)
Other assets |  | (18,630) | (8,310) | (23,068)
Accounts payable, accrued expenses, other liabilities and security deposits |  | (25,597) | 4,410 | (12,440)
Deferred revenue |  | 10,824 | 12,348 | 46,607
Change in lease liability - operating leases |  | (11,200) | 0 | 0
Net cash provided by operating activities |  | 376,473 | 441,537 | 543,001
Investing Activities |  |  |  |
Acquisitions of real estate property |  | (262,591) | (60,486) | (28,680)
Additions to land, buildings and improvements |  | (252,986) | (254,460) | (336,001)
Acquisition deposits and deferred purchase price |  | (5,239) | 0 | 0
Investments in unconsolidated joint ventures |  | (128,682) | (400,429) | (389,249)
Distributions in excess of cumulative earnings from unconsolidated joint ventures |  | 79,020 | 233,118 | 319,745
Net proceeds from disposition of real estate/joint venture interest |  | 208,302 | 1,231,004 | 692,796
Proceeds from sale of marketable securities |  | 0 | 0 | 55,129
Other investments |  | (7,869) | (38,912) | 25,330
Origination of debt and preferred equity investments |  | (607,844) | (731,216) | (1,129,970)
Repayments or redemption of debt and preferred equity investments |  | 1,092,383 | 703,043 | 812,914
Net cash provided by investing activities |  | 114,494 | 681,662 | 22,014
Financing Activities |  |  |  |
Proceeds from mortgages and other loans payable |  | 752,984 | 564,391 | 870,459
Repayments of mortgages and other loans payable |  | (230,076) | (868,842) | (902,460)
Proceeds from revolving credit facility and senior unsecured notes |  | 1,310,000 | 3,120,000 | 2,784,599
Repayments of revolving credit facility and senior unsecured notes |  | (1,570,000) | (2,560,000) | (2,276,782)
Payment of debt extinguishment costs |  | 0 | (13,918) | 0
Proceeds from stock options exercised and DRSPP issuance |  | 334 | 29,048 | 23,537
Repurchase of common stock |  | (384,399) | (979,541) | (806,302)
Redemption of preferred stock |  | (18,142) | (1,208) | (275)
Redemption of OP units |  | (27,495) | (33,972) | 0
Distributions to noncontrolling interests in other partnerships |  | (478) | (8,364) | (52,446)
Contributions from noncontrolling interests in other partnerships |  | 10,239 | 5,459 | 36,275
Acquisition of subsidiary interest from noncontrolling interest |  | (25,845) | 0 | 0
Distributions to noncontrolling interests in the Operating Partnership |  | (14,729) | (15,000) | (14,266)
Dividends/Distributions paid on common and preferred stock/units |  | (306,386) | (313,230) | (333,543)
Other obligations related to loan participations |  | 0 | 16 | 17,227
Tax withholdings related to restricted share awards |  | (3,495) | (3,842) | (3,879)
Deferred loan costs |  | (21,162) | (15,109) | (27,100)
Net cash used in financing activities |  | (528,650) | (1,094,112) | (684,956)
Net (decrease) increase in cash, cash equivalents, and restricted cash |  | (37,683) | 29,087 | (119,941)
Cash, cash equivalents, and restricted cash at beginning of year |  | 279,113 | 250,026 | 369,967
Cash, cash equivalents, and restricted cash at end of period |  | 241,430 | 279,113 | 250,026
Supplemental Cash Flow Information [Abstract] |  |  |  |
Interest paid |  | 248,684 | 259,776 | 273,819
Income taxes paid |  | 1,489 | 1,418 | 2,448
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |
Issuance of units in the operating partnership |  | 0 | 0 | 25,723
Conversion of units in the operating partnership |  | 471 | 16,303 | 21,574
Redemption of units in the operating partnership for a joint venture sale |  | 0 | 10,445 | 0
Exchange of debt investment for real estate or equity in joint venture |  | 34,498 | 298,956 | 0
Tenant improvements and capital expenditures payable |  | 6,056 | 0 | 6,667
Fair value adjustment to noncontrolling interest in the operating partnership |  | 34,320 | 34,236 | 5,712
Deconsolidation of a subsidiary | [1] | 395 | 298,404 | 695,204
Transfer of assets to assets held for sale |  | 391,664 | 0 | 611,809
Transfer of liabilities related to assets held for sale |  | 0 | 0 | 5,364
Removal of fully depreciated commercial real estate properties |  | 19,577 | 124,249 | 15,488
Contribution to consolidated joint venture by noncontrolling interest |  | 48,223 | 0 | 0
Share repurchase payable |  | 0 | 0 | 41,746
Recognition of right of use assets and related lease liabilities |  | 389,120 | 0 | 0
Total cash, cash equivalents, and restricted cash |  | 279,113 | 279,113 | 369,967
SL Green Operating Partnership |  |  |  |
Operating Activities |  |  |  |
Net income |  | 291,487 | 270,856 | 101,069
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation and amortization |  | 284,011 | 289,899 | 418,798
Equity in net loss (income) from unconsolidated joint ventures |  | 34,518 | (7,311) | (21,892)
Distributions of cumulative earnings from unconsolidated joint ventures |  | 864 | 10,277 | 20,309
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate |  | (76,181) | (303,967) | (16,166)
Purchase price and other fair value adjustments |  | (69,389) | (57,385) | 0
Depreciable real estate reserves and impairment |  | 7,047 | 227,543 | 178,520
Loss (gain) on sale of real estate, net |  | 16,749 | 30,757 | (73,241)
Loan loss reserves and other investment reserves, net of recoveries |  | 0 | 6,839 | 0
Gain on sale of investments in marketable securities |  | 0 | 0 | (3,262)
Loss on early extinguishment of debt |  | 0 | 17,083 | 0
Deferred rents receivable |  | (13,941) | (18,216) | (38,009)
Non-cash lease expense |  | 13,744 | 2,016 | 1,020
Other non-cash adjustments |  | 271 | 2,932 | 19,621
Changes in operating assets and liabilities: |  |  |  |
Tenant and other receivables |  | (4,968) | 6,968 | (5,717)
Related party receivables |  | 7,802 | (1,044) | (7,209)
Deferred lease costs |  | (70,938) | (44,158) | (41,939)
Other assets |  | (18,630) | (8,310) | (23,068)
Accounts payable, accrued expenses, other liabilities and security deposits |  | (25,597) | 4,410 | (12,440)
Deferred revenue |  | 10,824 | 12,348 | 46,607
Change in lease liability - operating leases |  | (11,200) | 0 | 0
Net cash provided by operating activities |  | 376,473 | 441,537 | 543,001
Investing Activities |  |  |  |
Acquisitions of real estate property |  | (262,591) | (60,486) | (28,680)
Additions to land, buildings and improvements |  | (252,986) | (254,460) | (336,001)
Acquisition deposits and deferred purchase price |  | (5,239) | 0 | 0
Investments in unconsolidated joint ventures |  | (128,682) | (400,429) | (389,249)
Distributions in excess of cumulative earnings from unconsolidated joint ventures |  | 79,020 | 233,118 | 319,745
Net proceeds from disposition of real estate/joint venture interest |  | 208,302 | 1,231,004 | 692,796
Proceeds from sale of marketable securities |  | 0 | 0 | 55,129
Other investments |  | (7,869) | (38,912) | 25,330
Origination of debt and preferred equity investments |  | (607,844) | (731,216) | (1,129,970)
Repayments or redemption of debt and preferred equity investments |  | 1,092,383 | 703,043 | 812,914
Net cash provided by investing activities |  | 114,494 | 681,662 | 22,014
Financing Activities |  |  |  |
Proceeds from mortgages and other loans payable |  | 752,984 | 564,391 | 870,459
Repayments of mortgages and other loans payable |  | (230,076) | (868,842) | (902,460)
Proceeds from revolving credit facility and senior unsecured notes |  | 1,310,000 | 3,120,000 | 2,784,599
Repayments of revolving credit facility and senior unsecured notes |  | (1,570,000) | (2,560,000) | (2,276,782)
Payment of debt extinguishment costs |  | 0 | (13,918) | 0
Proceeds from stock options exercised and DRSPP issuance |  | 334 | 29,048 | 23,537
Repurchase of common stock |  | (384,399) | (979,541) | (806,302)
Redemption of preferred stock |  | (18,142) | (1,208) | (275)
Redemption of OP units |  | (27,495) | (33,972) | 0
Distributions to noncontrolling interests in other partnerships |  | (478) | (8,364) | (52,446)
Contributions from noncontrolling interests in other partnerships |  | 10,239 | 5,459 | 36,275
Acquisition of subsidiary interest from noncontrolling interest |  | (25,845) | 0 | 0
Dividends/Distributions paid on common and preferred stock/units |  | (321,115) | (328,230) | (347,809)
Other obligations related to loan participations |  | 0 | 16 | 17,227
Tax withholdings related to restricted share awards |  | (3,495) | (3,842) | (3,879)
Deferred loan costs |  | (21,162) | (15,109) | (27,100)
Net cash used in financing activities |  | (528,650) | (1,094,112) | (684,956)
Net (decrease) increase in cash, cash equivalents, and restricted cash |  | (37,683) | 29,087 | (119,941)
Cash, cash equivalents, and restricted cash at beginning of year |  | 279,113 | 250,026 | 369,967
Cash, cash equivalents, and restricted cash at end of period |  | 241,430 | 279,113 | 250,026
Supplemental Cash Flow Information [Abstract] |  |  |  |
Interest paid |  | 248,684 | 259,776 | 273,819
Income taxes paid |  | 1,489 | 1,418 | 2,448
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |
Issuance of units in the operating partnership |  | 0 | 0 | 25,723
Conversion of units in the operating partnership |  | 471 | 16,303 | 21,574
Redemption of units in the operating partnership for a joint venture sale |  | 0 | 10,445 | 0
Exchange of debt investment for real estate or equity in joint venture |  | 34,498 | 298,956 | 0
Tenant improvements and capital expenditures payable |  | 6,056 | 0 | 6,667
Fair value adjustment to noncontrolling interest in the operating partnership |  | 34,320 | 34,236 | 5,712
Deconsolidation of a subsidiary | [2] | 395 | 298,404 | 695,204
Transfer of assets to assets held for sale |  | 391,664 | 0 | 611,809
Transfer of liabilities related to assets held for sale |  | 0 | 0 | 5,364
Removal of fully depreciated commercial real estate properties |  | 19,577 | 124,249 | 15,488
Contribution to consolidated joint venture by noncontrolling interest |  | 48,223 | 0 | 0
Share repurchase payable |  | 0 | 0 | 41,746
Recognition of right of use assets and related lease liabilities |  | 389,120 | 0 | 0
Total cash, cash equivalents, and restricted cash |  | 241,430 | 250,026 | 250,026
Preferred Units |  |  |  |
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |
Issuance of preferred units relating to the real estate acquisition |  | 1,000 | 0 | 0
Preferred Units | SL Green Operating Partnership |  |  |  |
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |
Issuance of preferred units relating to the real estate acquisition |  | $ 1,000 | $ 0 | $ 0
[1] | $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures.".
[2] | $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018.

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