CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ 96,450	$ 114,891	$ 97,463
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	170,038	167,186	167,289
Gains on sales of properties	(81,510)	(24,884)	(57,507)
Gains on sales of financial assets, net	0	0	(855)
Debt satisfaction (gains) charges, net	(3,562)	(25,240)	2,859
Impairment charges and loan losses	100,236	36,832	51,100
Straight-line rents	(37,445)	(46,432)	(46,254)
Other non-cash (income) expense, net	1,656	3,695	(390)
Equity in earnings of non-consolidated entities	(7,590)	(1,752)	(626)
Distributions of accumulated earnings from non-consolidated entities, net	815	2,056	1,381
Deferred taxes, net	59	(77)	124
Increase (decrease) in accounts payable and other liabilities	(1,657)	4,314	(3,716)
Change in rent receivable and prepaid rent, net	(1,825)	1,967	(617)
Increase (decrease) in accrued interest payable	808	2,438	(963)
Other adjustments, net	(1,200)	9,936	5,384
Net cash provided by operating activities:	235,273	244,930	214,672
Cash flows from investing activities:
Investment in real estate, including intangible assets	(167,797)	(349,926)	(122,395)
Investment in real estate under construction	(132,192)	(137,158)	(131,153)
Capital expenditures	(4,408)	(29,110)	(17,681)
Net proceeds from sale of properties	370,038	156,461	237,866
Principal payments received on loans receivable	2,214	4,746	44,661
Investment in loans receivable	0	(10,274)	(43,555)
Investments in and advances to non-consolidated entities, net	(37,240)	(18,900)	(2,948)
Distributions from non-consolidated entities in excess of accumulated earnings	8,175	1,728	1,314
Increase in deferred leasing costs	(6,558)	(6,681)	(10,484)
Proceeds from the sale of marketable equity securities	0	0	725
Investment in marketable equity securities	0	0	(689)
Change in escrow deposits and restricted cash	(21,571)	2,745	916
Change in real estate deposits	(20,848)	(1,902)	355
Net cash used in investing activities	(10,187)	(388,271)	(43,068)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(165,858)	(164,737)	(159,520)
Proceeds from senior notes	0	0	249,708
Conversion of convertible notes	(672)	(529)	(233)
Principal amortization payments	(26,796)	(32,440)	(35,206)
Principal payments on debt, excluding normal amortization	(109,973)	(106,956)	(202,262)
Change in revolving credit facility borrowing, net	(177,000)	177,000	(48,000)
Payment of developer liabilities	(4,016)	0	0
Increase in deferred financing costs	(1,842)	(9,336)	(4,558)
Proceeds of mortgages and notes payable	254,650	190,843	27,790
Proceeds from term loans	0	0	99,000
Change in restricted cash	0	(1,573)	0
Cash distributions to noncontrolling interests	(3,404)	(3,688)	(4,008)
Purchase of a noncontrolling interest	0	(4,022)	(2,100)
Repurchase of common shares	(8,973)	(18,431)	0
Redemption of noncontrolling interests	0	0	(1,962)
Issuance of common shares, net	12,186	19,382	23,563
Net cash provided by (used in) financing activities	(231,698)	45,513	(57,788)
Change in cash and cash equivalents	(6,612)	(97,828)	113,816
Cash and cash equivalents, at beginning of year	93,249	191,077	77,261
Cash and cash equivalents, at end of year	86,637	93,249	191,077
LCIF [Member]
Cash flows from operating activities:
Net income (loss)	(3,921)	42,315	59,549
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,660	31,145	29,187
Gains on sales of properties	(36,380)	0	(17,944)
Gains on sales of financial assets, net	0	0	(831)
Debt satisfaction (gains) charges, net	4,733	33	27
Impairment charges and loan losses	72,072	787	2,500
Straight-line rents	(26,891)	(35,962)	(34,146)
Other non-cash (income) expense, net	(1,914)	(2,190)	(1,510)
Equity in earnings of non-consolidated entities	(324)	(158)	(129)
Distributions of accumulated earnings from non-consolidated entities, net	324	150	15
Increase (decrease) in accounts payable and other liabilities	(2,180)	1,129	(1,892)
Change in rent receivable and prepaid rent, net	(710)	(316)	284
Increase (decrease) in accrued interest payable	(269)	(215)	(149)
Other adjustments, net	(293)	1,692	3,088
Net cash provided by operating activities:	38,907	38,410	38,049
Cash flows from investing activities:
Investment in real estate, including intangible assets	(52,700)	(152,000)	(49,526)
Investment in real estate under construction	(31,220)	(20,699)	(3,682)
Capital expenditures	(1,466)	(6,295)	(6,860)
Net proceeds from sale of properties	238,891	0	52,327
Principal payments received on loans receivable	0	3,480	1,304
Investment in loans receivable	0	(318)	0
Investments in and advances to non-consolidated entities, net	(81)	(1,683)	(263)
Distributions from non-consolidated entities in excess of accumulated earnings	478	503	738
Increase in deferred leasing costs	(1,156)	(1,553)	(4,558)
Real estate deposits	(28)	0	0
Change in escrow deposits and restricted cash	912	(843)	2,714
Net cash used in investing activities	153,630	(179,408)	(7,806)
Cash flows from financing activities:
Distributions to partners	(67,113)	(19,741)	(31,923)
Principal amortization payments	(1,311)	(1,454)	(1,828)
Principal payments on debt, excluding normal amortization	(23,934)	(28,626)	(9,000)
Increase in deferred financing costs	(79)	(1,281)	(694)
Proceeds of mortgages and notes payable	0	139,193	0
Proceeds of related party note	0	0	8,250
Related party note payment	0	(8,250)	0
Co-borrower debt payment	(58,000)	0	0
Related party advances, net	(9,199)	71,959	2,078
Redemption of noncontrolling interests	0	0	(1,962)
Net cash provided by (used in) financing activities	(159,636)	151,800	(35,079)
Change in cash and cash equivalents	32,901	10,802	(4,836)
Cash and cash equivalents, at beginning of year	19,130	8,328	13,164
Cash and cash equivalents, at end of year	$ 52,031	$ 19,130	$ 8,328