Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 4,401	$ 5,738
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	16,415	13,763
Amortization of above market lease	(2)	40
Equity in losses of non-consolidated REITs	187	(391)
Distributions from non-consolidated REITs		487
Increase (decrease) in bad debt reserve	(1,190)	65
Changes in operating assets and liabilities:
Restricted cash	(8)	(18)
Tenant rent receivables, net	582	305
Straight-line rents, net	(657)	(1,517)
Lease acquisition costs	(189)
Prepaid expenses and other assets, net	70	93
Accounts payable and accrued expenses	(5,011)	(3,388)
Accrued compensation	(2,000)	(1,776)
Tenant security deposits	(15)	173
Payment of deferred leasing commissions	(2,624)	(641)
Net cash provided by operating activities	9,959	12,933
Cash flows from investing activities:
Purchase of real estate assets, office computers and furniture	(3,465)	(5,376)
Investments in non-consolidated REITs	4,752	(1)
Distributions in excess of earnings from non-consolidated REITs	27	442
Investment in related party mortgage loan receivable	(3,000)	(31,770)
Changes in deposits on real estate assets	(1,500)
Net cash used in investing activities	(3,186)	(36,705)
Cash flows from financing activities:
Distributions to stockholders	(15,758)	(15,758)
Borrowings under bank note payable	5,000	45,000
Net cash provided by (used in) financing activities	(10,758)	29,242
Net increase (decrease) in cash and cash equivalents	(3,985)	5,470
Cash and cash equivalents, beginning of period	21,267	23,813
Cash and cash equivalents, end of period	17,282	29,283
Non-cash investing and financing activities:
Accrued costs for purchase of real estate assets	$ 1,074	$ 986