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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Operating Activities |  |
Net income/(loss) | $ 15,809 | $ 67,636
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities: |  |
Depreciation and amortization | 295,460 | 314,584
(Gain)/loss on sale of real estate owned | (50,829) | (61,303)
(Income)/loss from unconsolidated entities | (14,673) | (11,388)
Return on investment in unconsolidated joint ventures | 16,597 | 2,016
Amortization of share-based compensation | 11,310 | 10,808
Loss on extinguishment of debt, net | 41,950 |
Other | 15,754 | 8,203
Changes in operating assets and liabilities: |  |
(Increase)/decrease in operating assets | 925 | (20,282)
Increase/(decrease) in operating liabilities | (2,146) | 6,741
Net cash provided by/(used in) operating activities | 330,157 | 317,015
Investing Activities |  |
Acquisition of real estate assets | (295,301) | (141,727)
Proceeds from sales of real estate investments, net | 154,857 | 133,934
Development of real estate assets | (74,515) | (63,010)
Capital expenditures and other major improvements - real estate assets | (66,103) | (64,083)
Capital expenditures - non-real estate assets | (7,154) | (7,358)
Investment in unconsolidated joint ventures | (53,706) | (20,041)
Distributions received from unconsolidated joint ventures | 33,345 | 5,731
Purchase deposits on pending acquisitions | (5,100) |
Repayment/(issuance) of notes receivable, net | (1,060) | (5,340)
Net cash provided by/(used in) investing activities | (314,737) | (161,894)
Financing Activities |  |
Payments on secured debt | (543) | (31,621)
Payments on unsecured debt | (300,000) |
Net proceeds from the issuance of unsecured debt | 298,776 | 211,320
Net proceeds/(repayment) of commercial paper | 280,000 | (115,000)
Net proceeds/(repayment) of revolving bank debt | (706) | 597
Distributions paid to redeemable noncontrolling interests | (16,899) | (15,782)
Distributions paid to preferred stockholders | (2,109) | (2,115)
Distributions paid to common stockholders | (214,433) | (207,095)
Payment of prepayment and extinguishment costs | (40,769) |
Other | (6,838) | (5,840)
Net cash provided by/(used in) financing activities | (3,521) | (165,536)
Net increase/(decrease) in cash, cash equivalents, and restricted cash | 11,899 | (10,415)
Cash, cash equivalents, and restricted cash, beginning of year | 24,171 | 33,291
Cash, cash equivalents, and restricted cash, end of period | 36,070 | 22,876
Supplemental Information: |  |
Interest paid during the period, net of amounts capitalized | 71,006 | 78,170
Operating cash flows from operating leases | 6,251 | 6,251
Cash paid/(refunds received) for income taxes | 3,013 | 1,324
Non-cash transactions: |  |
Secured debt assumed upon acquisition of real estate assets | 201,296 |
Acquisition of land parcel pursuant to a deed in lieu of foreclosure | 25,000 |
Cancellation of secured note receivable pursuant to a deed in lieu of foreclosure | 24,869 |
Transfer of investment in and advances to unconsolidated joint ventures to real estate owned |  | 14,700
Acquisition of intellectual property in exchange for cancellation of secured note receivable |  | 2,250
Recognition of allowance for credit losses |  | 2,182
Vesting of LTIP Units | 14,576 | 23,018
Development costs and capital expenditures incurred, but not yet paid | 38,541 | 26,400
Conversion of Operating Partnership and DownREIT Partnership noncontrolling interests to common stock (136,206 shares in 2021 and 261,196 shares in 2020) | 5,339 | 11,250
Dividends declared, but not yet paid | $ 116,688 | $ 115,254

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