CONSOLIDATED STATEMENTS OF CASH FLOWS (UNITED DOMINION REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net income/(loss)	$ 5,540	$ 26,602
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	157,501	114,124
(Income)/loss from unconsolidated entities	(3,367)	(49)
Other	(1,215)	3,910
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	114	2,295
Increase/(decrease) in operating liabilities	(31,666)	(17,463)
Net cash provided by/(used in) operating activities	135,456	137,333
Investing Activities
Acquisition of real estate assets	(141,727)	(403,245)
Capital expenditures and other major improvements - real estate assets	(32,983)	(31,264)
Distributions received from unconsolidated entities	3,271	10,797
Net cash provided by/(used in) investing activities	(214,044)	(459,749)
Financing Activities
Payments on secured debt	(2,781)	(962)
Other	(3,964)	1,706
Net cash provided by/(used in) financing activities	68,226	137,679
Net increase/(decrease) in cash, cash equivalents, and restricted cash	(10,362)	(184,737)
Cash, cash equivalents, and restricted cash, beginning of year	33,291	208,891
Cash, cash equivalents, and restricted cash, end of period	22,929	24,154
Supplemental Information:
Interest paid during the period, net of amounts capitalized	57,320	44,271
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	25,568	10,745
Recognition of operating lease liabilities		88,336
Dividends declared but not yet paid	115,259	105,548
United Dominion Realty L.P.
Operating Activities
Net income/(loss)	24,640	24,334
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	35,300	34,654
(Income)/loss from unconsolidated entities	1,761	2,740
Other	880	1,364
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	(500)	2,529
Increase/(decrease) in operating liabilities	3,324	3,006
Net cash provided by/(used in) operating activities	65,405	68,627
Investing Activities
Capital expenditures and other major improvements - real estate assets	(10,960)	(14,271)
Distributions received from unconsolidated entities	4,844	4,613
Net cash provided by/(used in) investing activities	(6,116)	(9,658)
Financing Activities
Issuance/(repayment) of notes payable to the General Partner	(56,497)	(55,599)
Distributions paid to partnership unitholders	(2,653)	(2,989)
Net cash provided by/(used in) financing activities	(59,150)	(58,588)
Net increase/(decrease) in cash, cash equivalents, and restricted cash	139	381
Cash, cash equivalents, and restricted cash, beginning of year	14,022	13,688
Cash, cash equivalents, and restricted cash, end of period	14,161	14,069
Supplemental Information:
Interest paid during the period, net of amounts capitalized	10,665	5,031
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	3,383	3,676
Recognition of operating lease right-of-use assets		94,174
Recognition of operating lease liabilities		88,161
LTIP Unit grants	5,534	10,032
Dividends declared but not yet paid	$ 66,833	$ 63,451