CONSOLIDATED STATEMENTS OF CASH FLOWS (UNITED DOMINION REALTY, L.P.) (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net income/(loss)	$ 131,927	$ 57,028
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	327,594	325,413
(Gain)/loss on sale of real estate owned	(70,300)	(2,132)
(Income)/loss from unconsolidated entities	5,091	(11,591)
Other	2,108	13,069
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	(13,199)	(7,782)
Increase/(decrease) in operating liabilities	9,961	1,590
Net cash provided by/(used in) operating activities	406,724	389,276
Investing Activities
Proceeds from sales of real estate investments, net	89,433	3,250
Capital expenditures and other major improvements — real estate assets, net of escrow reimbursement	(76,381)	(91,633)
Distributions received from unconsolidated entities	30,574	65,053
Net cash provided by/(used in) investing activities	(203,106)	(383,371)
Financing Activities
Proceeds from the issuance of secured debt	80,000
Payments on secured debt	(82,472)	(325,212)
Other	(36,317)	(13,424)
Net cash provided by/(used in) financing activities	(197,368)	(5,810)
Net increase/(decrease) in cash, cash equivalents, and restricted cash	6,250	95
Cash, cash equivalents, and restricted cash, beginning of year	21,830	22,106
Cash, cash equivalents, and restricted cash, end of period	28,080	22,201
Supplemental Information:
Interest paid during the period, net of amounts capitalized	104,136	95,008
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	23,437	48,995
Distributions declared but not yet paid	95,372	91,454
United Dominion Reality L.P.
Operating Activities
Net income/(loss)	145,161	46,310
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation and amortization	108,906	113,167
(Gain)/loss on sale of real estate owned	(70,300)
(Income)/loss from unconsolidated entities	10,102	14,556
Other	850	7,120
Changes in operating assets and liabilities:
(Increase)/decrease in operating assets	(2,968)	(1,084)
Increase/(decrease) in operating liabilities	4,747	3,363
Net cash provided by/(used in) operating activities	196,498	183,432
Investing Activities
Proceeds from sales of real estate investments, net	89,433
Capital expenditures and other major improvements — real estate assets, net of escrow reimbursement	(31,828)	(42,750)
Distributions received from unconsolidated entities	13,033	12,528
Net cash provided by/(used in) investing activities	70,638	(30,222)
Financing Activities
Advances (to)/from General Partner, net	(256,972)	135,155
Payments on secured debt		(275,345)
Distributions paid to partnership unitholders	(9,438)	(8,627)
Other		(4,013)
Net cash provided by/(used in) financing activities	(266,410)	(152,830)
Net increase/(decrease) in cash, cash equivalents, and restricted cash	726	380
Cash, cash equivalents, and restricted cash, beginning of year	12,872	12,450
Cash, cash equivalents, and restricted cash, end of period	13,598	12,830
Supplemental Information:
Interest paid during the period, net of amounts capitalized	10,980	20,983
Non-cash transactions:
Development costs and capital expenditures incurred but not yet paid	3,472	4,027
LTIP Unit grants	12,964	6,127
Distributions declared but not yet paid	$ 59,461	$ 57,028