CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 53,715	$ 50,667	$ 12,706
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	33,683	34,499	33,520
Amortization of financing costs	3,918	6,054	3,722
Gain from bargain purchase	0	(33,805)	0
Gain on sale of property	(46,830)	0	(7,143)
Gain on debt extinguishment	(1,268)	0	(7,057)
Impairment of asset	6,925	0	0
Amortization of discount on convertible debt	829	1,042	1,280
Non-cash accretion of notes receivable	(786)	(6,164)	(5,352)
Share compensation expense	4,299	4,104	3,969
Equity in (earnings) losses of unconsolidated affiliates	(1,555)	(10,971)	1,529
Impairment of investment in unconsolidated affiliate	0	0	3,768
Distributions of operating income from unconsolidated affiliates	5,515	12,124	880
Reserve for notes receivable	0	0	1,734
Provision for bad debt	252	3,331	4,132
Other, net	472	906	7,457
Changes in assets and liabilities
Cash in escrow	7,319	(20,028)	(1,788)
Rents receivable, net	(8,894)	(4,662)	(8,370)
Prepaid expenses and other assets	(5,906)	4,297	6,166
Accounts receivable from related parties	1,034	(2,408)	1,990
Accounts payable and accrued expenses	14,513	1,874	(5,902)
Other liabilities	(903)	3,517	221
Net cash provided by operating activities	66,332	44,377	47,462
CASH FLOWS FROM INVESTING ACTIVITIES
Investments in real estate	(181,498)	(80,520)	(127,322)
Deferred acquisition and leasing costs	(6,298)	(3,904)	(11,368)
Investments in and advances to unconsolidated affiliates	(54,981)	(19,116)	(5,603)
Return of capital from unconsolidated affiliates	4,504	785	4,705
Repayments of notes receivable	56,519	42,010	13,614
Increase in notes receivable	(34,343)	0	(9,362)
Proceeds from sale of property	62,940	0	11,956
Net cash used in investing activities	(153,157)	(60,745)	(123,380)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage notes	(161,389)	(127,823)	(182,610)
Proceeds received on mortgage notes	144,959	175,793	260,065
Purchase of convertible notes payable	(48,997)	(240)	(46,736)
Increase in deferred financing and other costs	(2,877)	(6,830)	(1,755)
Capital contributions from noncontrolling interests	117,945	33,556	25,653
Distributions to noncontrolling interests	(8,605)	(1,638)	(2,879)
Dividends paid to Common Shareholders	(29,033)	(28,909)	(30,163)
Proceeds from issuance of Common Shares, net of issuance costs	44,659	0	65,222
Repurchase and cancellation of Common Shares	(726)	(966)	(5,424)
Common Shares issued under Employee Share Purchase Plan	93	100	106
Exercise of options to purchase Common Shares	16	109	1,556
Net cash provided by financing activities	56,045	43,152	83,035
(Decrease) increase in cash and cash equivalents	(30,780)	26,784	7,117
Cash and cash equivalents, beginning of period	120,592	93,808	86,691
Cash and cash equivalents, end of period	89,812	120,592	93,808
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $4,850, $2,903 and $3,516, respectively	32,120	31,920	30,183
Cash paid for income taxes	3,776	1,263	777
Supplemental disclosure of non-cash investing and financing activities
Dividends paid through the issuance of Common Shares	0	0	16,192
Acquisition of interest in unconsolidated affiliates
Real Estate, net	0	(108,000)	0
Assumption of mortgage debt	0	25,990	0
Gain from bargain purchase	0	33,805	0
Other assets and liabilities	0	7,532	0
Investment in unconsolidated affiliates	0	37,824	0
Cash included in investment in real estate	$ 0	$ (2,849)	$ 0