Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 12,533	$ 3,573
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	23,189	24,797
Amortization of above market lease	6us-gaap_AmortizationOfIntangibleAssets	(11)us-gaap_AmortizationOfIntangibleAssets
Equity in losses of non-consolidated REITs	322	484
Gain on sale of properties, less applicable income tax	(10,462)us-gaap_GainLossOnDispositionOfAssets1
Changes in operating assets and liabilities:
Restricted cash	686	(45)
Tenant rent receivables	146	(933)
Straight-line rents	(69)us-gaap_StraightLineRent	(1,784)us-gaap_StraightLineRent
Lease acquisition costs	(3)	(347)
Prepaid expenses and other assets	283	800
Accounts payable, accrued expenses and other items	(7,706)	(7,257)
Accrued compensation	(2,517)	(1,958)
Tenant security deposits	(230)	231
Payment of deferred leasing commissions	(1,116)	(1,113)
Net cash provided by operating activities	15,062	16,437
Cash flows from investing activities:
Property improvements, fixtures and equipment	(4,298)	(4,850)
Distributions in excess of earnings from non-consolidated REITs	27	27
Investment in related party mortgage loan receivable		(2,170)
Proceeds received on sales of real estate assets	47,671
Changes in deposits on real estate assets	(4,000)
Net cash provided by (used in) investing activities	39,400	(6,993)
Cash flows from financing activities:
Distributions to stockholders	(19,036)us-gaap_PaymentsOfDividendsCommonStock	(19,036)us-gaap_PaymentsOfDividendsCommonStock
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Repayments of bank note payable	(48,000)us-gaap_RepaymentsOfLinesOfCredit
Net cash used in financing activities	(47,036)	(9,036)
Net increase in cash and cash equivalents	7,426	408
Cash and cash equivalents, beginning of year	7,519	19,623
Cash and cash equivalents, end of period	14,945	20,031
Non-cash investing and financing activities:
Accrued costs for purchase of real estate assets	$ 2,998	$ 1,080

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