Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 2,174	$ 38,462
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	41,846	36,563
Amortization of above market lease	56	(119)
(Gain) on sale of properties and provision for loss on property held for sale of $14,300 less applicable income tax	14,300	(21,939)
Equity in earnings of non-consolidated REITs	(1,061)	(2,805)
Distributions from non-consolidated REITs	1,246	3,034
Increase (decrease) in bad debt reserve	105	(365)
Changes in operating assets and liabilities:
Restricted cash	(53)	(57)
Tenant rent receivables, net	173	869
Straight-line rents, net	(3,498)	(7,404)
Lease acquisition costs	(2,235)	(55)
Prepaid expenses and other assets, net	(1,278)	171
Accounts payable and accrued expenses	(25)	4,131
Accrued compensation	(28)	(420)
Tenant security deposits	273	523
Payment of deferred leasing commissions	(2,425)	(6,710)
Net cash provided by operating activities	49,570	43,879
Cash flows from investing activities:
Purchase of real estate assets, office computers and furniture	(49,209)	(155,320)
Acquired real estate leases	(14,376)	(58,955)
Investments in non-consolidated REITs	(1)	(10)
Distributions in excess of earnings from non-consolidated REITs	1,487	1,052
Investment in related party mortgage loan receivable	(73,920)	(4,232)
Repayment of related party mortgage loan receivable	106,200
Changes in deposits on real estate assets		200
Investment in assets held for syndication, net		(2,427)
Proceeds received on sales of real estate assets		96,790
Net cash used in investing activities	(29,819)	(122,902)
Cash flows from financing activities:
Distributions to stockholders	(47,274)	(46,419)
Proceeds from equity offering, net		18,001
Proceeds from offering		(536)
Borrowings under bank note payable	160,000	375,000
Repayment of bank note payable	(527,000)	(209,968)
Borrowing of term loan payable	400,000	(74,850)
Deferred financing costs	(5,328)	(5,389)
Swap termination payment		(982)
Net cash used in financing activities	(19,602)	54,857
Net increase (decrease) in cash and cash equivalents	149	(24,166)
Cash and cash equivalents, beginning of period	23,813	68,213
Cash and cash equivalents, end of period	23,962	44,047
Non-cash investing and financing activities:
Accrued costs for purchase of real estate assets	774	2,456
Accrued costs for equity offerings		$ 170