CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Net cash provided by operating activities	$ 169,656	$ 172,407
Cash flows from investing activities:
Acquisition of real estate, including intangible assets	(207,791)	(418,574)
Investment in real estate under construction	0	(81,364)
Capital expenditures	(11,349)	(13,367)
Net proceeds from sale of properties	807,739	186,499
Net proceeds from sale of non-consolidated investment	0	6,127
Principal payments received on loans receivable	0	89,670
Investments in and advances to non-consolidated entities	(8,580)	(4,068)
Distributions from non-consolidated entities in excess of accumulated earnings	590	477
Increase in deferred leasing costs	(3,074)	(5,284)
Change in real estate deposits, net	(85)	10,938
Net cash provided by (used in) investing activities	577,450	(228,946)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(132,088)	(128,996)
Principal amortization payments	(22,622)	(23,243)
Principal payments on debt, excluding normal amortization	(6,708)	(41,488)
Proceeds from term loans	0	95,000
Term loan payments	(151,000)	0
Revolving credit facility borrowings	150,000	270,000
Revolving credit facility payments	(310,000)	(70,000)
Deferred financing costs	(667)	(1,252)
Payment of early extinguishment of debt charges	0	(55)
Proceeds of mortgages and notes payable	26,350	0
Cash distributions to noncontrolling interests	(2,699)	(2,563)
Issuance of common shares, net of costs and repurchases to settle tax obligations	(2,818)	16,848
Repurchase of common shares	(15,023)	0
Net cash provided by (used in) financing activities	(467,275)	114,251
Change in cash, cash equivalents and restricted cash	279,831	57,712
Cash, cash equivalents and restricted cash, at beginning of period	112,156	117,779
Cash, cash equivalents and restricted cash, at end of period	391,987	175,491
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents at beginning of period	107,762	86,637
Cash and cash equivalents at end of period	128,444	140,545
Restricted cash at beginning of period	4,394	31,142
Restricted cash at end of period	263,543	34,946
LCIF [Member]
Net cash provided by operating activities	28,127	32,685
Cash flows from investing activities:
Acquisition of real estate, including intangible assets	(67,965)	(24,317)
Investment in real estate under construction	0	(20,894)
Capital expenditures	(4,329)	(3,925)
Net proceeds from sale of properties	206,929	7,106
Investments in and advances to non-consolidated entities	(8,085)	(1,067)
Distributions from non-consolidated entities in excess of accumulated earnings	477	855
Increase in deferred leasing costs	(9)	(2,157)
Real estate deposits	(14)	(24)
Net cash provided by (used in) investing activities	127,004	(44,423)
Cash flows from financing activities:
Distributions to partners	(44,857)	(50,747)
Principal amortization payments	(838)	(785)
Deferred financing costs	(339)	(13)
Proceeds of mortgages and notes payable	26,350	0
Co-borrower debt borrowings (payments), net	(90,000)	200,000
OP unit redemptions	0	(129,990)
Related party advances, net	2,072	8,124
Net cash provided by (used in) financing activities	(107,612)	26,589
Change in cash, cash equivalents and restricted cash	47,519	14,851
Cash, cash equivalents and restricted cash, at beginning of period	51,832	53,576
Cash, cash equivalents and restricted cash, at end of period	99,351	68,427
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents at beginning of period	50,900	52,031
Cash and cash equivalents at end of period	16,153	66,887
Restricted cash at beginning of period	932	1,545
Restricted cash at end of period	$ 83,198	$ 1,540