CONSOLIDATED STATEMENTS OF CASH FLOWS (UNITED DOMINION REALTY, L.P.) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net income/(loss)	$ 40,419	$ 94,342
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	470,420	362,746
(Income)/loss from unconsolidated entities	(14,328)	(19,387)
Other	4,771	7,815
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	(22,628)	49
Increase/(decrease) in operating liabilities	(2,217)	(6,814)
Net cash provided by/(used in) operating activities	456,592	456,876
Investing Activities
Capital expenditures and other major improvements - real estate assets	(105,257)	(113,572)
Distributions received from unconsolidated entities	8,085	61,412
Net cash provided by/(used in) investing activities	(292,731)	(1,382,802)
Financing Activities
Proceeds from the issuance of secured debt	160,930	162,500
Payments on secured debt	(358,098)	(160,547)
Other	(9,610)	2,244
Net cash provided by/(used in) financing activities	(172,952)	740,576
Net increase/(decrease) in cash, cash equivalents, and restricted cash	(9,091)	(185,350)
Cash, cash equivalents, and restricted cash, beginning of year	33,291	208,891
Cash, cash equivalents, and restricted cash, end of period	24,200	23,541
Supplemental Information:
Interest paid during the period, net of amounts capitalized	141,871	125,298
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	27,705	12,174
Recognition of operating lease liabilities		88,336
Right-of-use assets obtained in exchange for operating lease liabilities remeasurements		42,143
Right-of-use asset obtained in exchange for new operating lease liability		94,349
Dividends declared but not yet paid	115,055	108,939
United Dominion Realty L.P.
Operating Activities
Net income/(loss)	63,558	79,427
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	106,065	104,730
(Income)/loss from unconsolidated entities	4,984	6,917
Other	4,382	843
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	(8,020)	2,801
Increase/(decrease) in operating liabilities	9,447	3,156
Net cash provided by/(used in) operating activities	180,416	197,874
Investing Activities
Capital expenditures and other major improvements - real estate assets	(36,185)	(45,508)
Distributions received from unconsolidated entities	14,533	13,840
Net cash provided by/(used in) investing activities	(21,652)	(31,668)
Financing Activities
Proceeds from the issuance of secured debt		72,500
Issuance/(repayment) of notes payable to the General Partner	(146,899)	(231,011)
Distributions paid to partnership unitholders	(10,340)	(6,330)
Other	(11)	(376)
Net cash provided by/(used in) financing activities	(157,250)	(165,217)
Net increase/(decrease) in cash, cash equivalents, and restricted cash	1,514	989
Cash, cash equivalents, and restricted cash, beginning of year	14,022	13,688
Cash, cash equivalents, and restricted cash, end of period	15,536	14,677
Supplemental Information:
Interest paid during the period, net of amounts capitalized	31,613	28,755
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	3,834	4,520
Recognition of operating lease right-of-use assets		94,174
Recognition of operating lease liabilities		88,161
Right-of-use assets obtained in exchange for operating lease liabilities remeasurements		42,143
Right-of-use asset obtained in exchange for new operating lease liability	163
LTIP Unit grants	12,108	21,980
Dividends declared but not yet paid	$ 66,833	$ 63,367