CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 114,891	$ 97,463	$ 3,863
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	167,186	167,289	183,833
Gains on sales of properties	(24,884)	(57,507)	(24,472)
Gains on sales of financial assets, net	0	(855)	0
Debt satisfaction (gains) charges, net	(25,240)	2,859	3,989
Impairment charges and loan losses	36,832	51,100	48,499
Straight-line rents	(46,432)	(46,254)	(23,538)
Other non-cash (income) expense, net	3,695	(390)	5,248
Equity in (earnings) losses of non-consolidated entities	(1,752)	(626)	157
Distributions of accumulated earnings from non-consolidated entities, net	2,056	1,381	918
Deferred taxes, net	(77)	124	752
Increase (decrease) in accounts payable and other liabilities	4,314	(3,716)	6,223
Change in rent receivable and prepaid rent, net	1,967	(617)	4,420
Increase (decrease) in accrued interest payable	2,438	(963)	(1,058)
Other adjustments, net	9,936	5,384	(2,530)
Net cash provided by operating activities:	244,930	214,672	206,304
Cash flows from investing activities:
Investment in real estate, including intangible assets	(349,926)	(122,395)	(447,571)
Investment in real estate under construction	(137,158)	(131,153)	(106,009)
Capital expenditures	(29,110)	(17,681)	(48,822)
Net proceeds from sale of properties	156,461	237,866	75,519
Principal payments received on loans receivable	4,746	44,661	2,056
Investment in loans receivable	(10,274)	(43,555)	(60,727)
Investments in and advances to non-consolidated entities, net	(18,900)	(2,948)	(8,193)
Distributions from non-consolidated entities in excess of accumulated earnings	1,728	1,314	15,603
Increase in deferred leasing costs	(6,681)	(10,484)	(12,060)
Proceeds from the sale of marketable equity securities	0	725	0
Investment in marketable equity securities	0	(689)	0
Change in escrow deposits and restricted cash	2,745	916	(7,141)
Change in real estate deposits	(1,902)	355	(238)
Net cash used in investing activities	(388,271)	(43,068)	(597,583)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(164,737)	(159,520)	(135,539)
Proceeds from senior notes	0	249,708	247,565
Conversion of convertible notes	(529)	(233)	(3,270)
Principal amortization payments	(32,440)	(35,206)	(34,446)
Principal payments on debt, excluding normal amortization	(106,956)	(202,262)	(347,122)
Change in revolving credit facility borrowing, net	177,000	(48,000)	48,000
Increase in deferred financing costs	(9,336)	(4,558)	(12,307)
Proceeds of mortgages and notes payable	190,843	27,790	253,500
Proceeds from term loans	0	99,000	151,000
Change in restricted cash	(1,573)	0	0
Cash distributions to noncontrolling interests	(3,688)	(4,008)	(3,870)
Purchase of a noncontrolling interest	(4,022)	(2,100)	(8,918)
Repurchase of common and preferred shares	(18,431)	0	(155,004)
Redemption of noncontrolling interests	0	(1,962)	0
Issuance of common shares, net	19,382	23,563	434,927
Net cash provided by (used in) financing activities	45,513	(57,788)	434,516
Change in cash and cash equivalents	(97,828)	113,816	43,237
Cash and cash equivalents, at beginning of year	191,077	77,261	34,024
Cash and cash equivalents, at end of year	$ 93,249	$ 191,077	$ 77,261