CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income (loss)	$ 3,863	$ 184,638	$ (89,778)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	183,833	171,969	168,288
Gain on acquisition	0	(167,864)	0
Gains on sales of properties	(24,472)	(13,291)	(6,557)
Debt satisfaction charges, net	3,989	8,062	311
Impairment charges and loan losses	48,499	9,969	117,443
Straight-line rents	(23,538)	(7,372)	(1,763)
Other non-cash (income) expense, net	5,248	(1,139)	(6,364)
Equity in earnings (losses) of non-consolidated entities	157	(21,531)	(30,334)
Distributions of accumulated earnings from non-consolidated entities, net	918	7,498	11,549
Deferred taxes, net	752	(186)	(1,799)
Increase (decrease) in accounts payable and other liabilities	6,223	(598)	1,589
Change in rent receivable and prepaid rent, net	4,420	(1,325)	19,929
Decrease in accrued interest payable	(1,058)	(2,473)	(970)
Other adjustments, net	(2,530)	(2,547)	(1,407)
Net cash provided by operating activities:	206,304	163,810	180,137
Cash flows from investing activities:
Investment in real estate, including intangible assets	(447,571)	(98,083)	(25,811)
Investment in real estate under construction	106,009	113,262	69,755
Capital expenditures	(48,822)	(49,952)	(32,426)
Acquisition of remaining interest in NLS, net of cash acquired of $8,107	0	(1,331)	0
Net proceeds from sale of properties	75,519	155,240	124,039
Principal payments received on loans receivable	2,056	6,841	46,867
Investment in loans receivable	(60,727)	(11,470)	(32,591)
Investments in and advances to non-consolidated entities, net	(8,193)	(20,172)	(19,940)
Proceeds from sale of interest in non-consolidated entity	0	7,000	0
Distributions from non-consolidated entities in excess of accumulated earnings	15,603	351	5,900
Increase in deferred leasing costs	(12,060)	(14,826)	(15,870)
Change in escrow deposits and restricted cash	(7,141)	5,710	(3,405)
Real estate deposits	(238)	(149)	(1,821)
Net cash used in investing activities	(597,583)	(134,103)	(24,813)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(135,539)	(103,295)	(94,861)
Repurchase of exchangeable notes	0	(62,150)	0
Proceeds from senior notes	247,565	0	0
Conversion of convertible notes	(3,270)	(2,427)	0
Principal amortization payments	(34,446)	(31,252)	(31,068)
Principal payments on debt, excluding normal amortization	(347,122)	(288,094)	(105,266)
Change in revolving credit facility borrowing, net	48,000	0	0
Increase in deferred financing costs	(12,307)	(6,431)	(4,214)
Proceeds of mortgages and notes payable	253,500	121,000	15,000
Proceeds from term loans	151,000	255,000	0
Contributions from noncontrolling interests	0	889	2
Cash distributions to noncontrolling interests	(3,870)	(35,381)	(5,811)
Purchase of a noncontrolling interest	8,918	0	0
Repurchase of preferred shares	(155,004)	(70,000)	(15,456)
Payments on forward equity commitment, net	0	0	(2,313)
Issuance of common shares, net	434,927	162,747	99,730
Net cash provided by (used in) financing activities	434,516	(59,394)	(144,257)
Change in cash and cash equivalents	43,237	(29,687)	11,067
Cash and cash equivalents, at beginning of year	34,024	63,711	52,644
Cash and cash equivalents, at end of year	$ 77,261	$ 34,024	$ 63,711