CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 17,305	$ 20,185
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,671	11,978
Realized and unrealized gain from restricted investment in marketable securities		(4,067)
Equity in earnings of unconsolidated joint venture	(18)	(224)
Distributions from unconsolidated joint venture	150	150
Lease termination fee related to restricted cash	10,865	10,381
Stock-based compensation expense	29	57
Other		10
Changes in operating assets and liabilities, net of liabilities assumed:
Proceeds from sale of investment in marketable securities		16,211
Deferred rent	375	228
Other assets	(1,214)	(2,067)
Interest payable	(45)	(95)
Security deposits	(220)	22
Prepaid rent	(2,124)	(679)
Accounts payable and accrued expenses	2,253	817
Net cash provided by operating activities	39,027	52,907
Cash flows from investing activities:
Improvements to real estate assets	(1,539)
Decrease in restricted cash	6,803	100
Purchase of real estate		(3,852)
Net cash provided by (used in) investing activities	5,264	(3,752)
Cash flows from financing activities:
Principal payments on mortgage notes payable	(7,204)	(6,310)
Principal payments on mortgage note payable (related parties)	(285)	(265)
Proceeds from note payable (related parties)		41,446
Payments on note payable (related parties)		(23,000)
Payments on note payable	(10,776)	(10,381)
Net repayments on revolving line of credit		(14,466)
Net proceeds from exercise of stock options		67
Distributions paid to noncontrolling interests	(23,785)	(25,180)
Dividends paid to common stockholders	(6,229)	(6,587)
Net cash used in financing activities	(48,279)	(44,676)
Net (decrease) increase in cash and cash equivalents	(3,988)	4,479
Cash and cash equivalents, beginning of period	3,988	986
Cash and cash equivalents, end of period		5,465
Supplemental information:
Cash paid for interest	10,677	10,114
Supplemental schedule of non-cash investing and financing activities:
Issuance of common stock upon conversion of O.P. units	$ 3,266	$ 546