CONSOLIDATED STATEMENTS OF CASH FLOWS - 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)
Return on investment in unconsolidated joint ventures	1,741	1,977
Amortization of share-based compensation	6,808	5,937
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)
Development of real estate assets	(23,087)	(6,237)
Capital expenditures and other major improvements - real estate assets	(32,983)	(31,264)
Capital expenditures - non-real estate assets	(2,479)	(3,346)
Investment in unconsolidated joint ventures	(16,139)	(21,389)
Distributions received from unconsolidated joint ventures	3,271	10,797
Purchase deposits on pending acquisitions		(10,350)
Repayment/(issuance) of notes receivable, net	(900)	5,285
Net cash provided by/(used in) investing activities	(214,044)	(459,749)
Financing Activities
Payments on secured debt	(2,781)	(962)
Net proceeds from the issuance of unsecured debt	211,320
Net proceeds/(repayment) of commercial paper	(85,000)	(11,115)
Net proceeds/(repayment) of revolving bank debt	58,214	54,294
Proceeds from the issuance of common shares through public offering, net		192,179
Distributions paid to redeemable noncontrolling interests	(7,618)	(8,553)
Distributions paid to preferred stockholders	(1,015)	(959)
Distributions paid to common stockholders	(100,930)	(88,911)
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
Cash paid/(refunds received) for income taxes	323	241
Non-cash transactions:
Transfer of investment in and advances to unconsolidated joint ventures to real estate owned	14,700	40,433
Acquisition of intellectual property in exchange for cancellation of secured note receivable	2,250
Recognition of allowance for credit losses	2,182
Recognition of operating lease right-of-use assets		94,349
Recognition of operating lease liabilities		88,336
Vesting of LTIP Units	23,018	14,335
Development costs and capital expenditures incurred but not yet paid	25,568	10,745
Conversion of Operating Partnership and DownREIT Partnership noncontrolling interests to common stock (167,631 shares in 2020 and 1,838,133 shares in 2019)	7,830	72,846
Dividends declared but not yet paid	$ 115,259	$ 105,548