Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Income (Loss)	$ 37,335	$ (19,638)	$ (36,730)
Adjustments to reconcile income (loss) to net cash provided by operating activities:
Depreciation (including discontinued operations)	15,984	17,234	19,429
Amortization of in-place lease intangible assets (including discontinued operations)	4,903	7,474	8,856
Amortization of net above- and below- market leases (including discontinued operations)	(882)	(2,396)	(1,783)
Amortization of financing fees (including discontinued operations)	1,023	765	848
Amortization of debt premium and discount (including discontinued operations)	(339)	(214)	(214)
Amortization of lease commissions (including discontinued operations)	842	672	727
Loss (gain) on sale of discontinued operations	117	0	(822)
Gain on disposal of fixed assets	0	(124)	0
Gain on consolidation of real estate affiliate	(34,852)	0	0
Gain on transfer of property and extinguishment of debt (including discontinued operations)	(14,607)	0	242
Provision for doubtful accounts (including discontinued operations)	557	452	889
Straight line rent	(499)	(112)	368
Provision for impairment of real estate, net	913	14,934	25,639
Equity in loss of unconsolidated affiliates	176	1,493	2,373
Net changes in assets and liabilities:
Tenant accounts receivable	(346)	(346)	333
Prepaid expenses and other assets	(194)	(302)	249
Advisor fees payable	(323)	(130)	(628)
Accounts payable and other accrued expenses	3,996	(431)	(736)
Net cash provided by operating activities	13,804	19,331	19,040
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of real estate investments	(8,831)	0	0
Proceeds from sales of real estate investments	5,120	0	53,382
Proceeds from disposal of fixed assets	0	344	0
Capital improvements and lease commissions	(9,190)	(6,382)	(3,612)
Distributions received from unconsolidated affiliates in excess of income	0	0	999
Loan escrows	(4,057)	(6,618)	(6,176)
Effect of change in accounting principle to beginning cash	0	0	(1,913)
Net cash (used in) provided by investing activities	(16,958)	(12,656)	42,680
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	88,092	200	0
Offering Costs	(460)	0	0
Repurchase of shares	(26,885)	0	0
Distributions to stockholders	(6,286)	(1,858)	0
Distributions paid to noncontrolling interests	(734)	(950)	(757)
Contributions received from noncontrolling interests	458	756	529
Debt issuance costs	0	(617)	(205)
Principal payments on mortgage notes and other debt payable	(42,090)	(9,633)	(72,115)
Net cash provided by (used in) financing activities	12,095	(12,102)	(72,548)
Net increase (decrease) in cash and cash equivalents	8,941	(5,427)	(10,828)
Effect of exchange rates	12	29	1
Cash and cash equivalents at the beginning of the year	28,033	33,431	44,258
Cash and cash equivalents at the end of the year	36,986	28,033	33,431
Interest paid	27,054	31,981	35,681
Non-cash activities:
Write-offs of receivables	718	540	780
Write-offs of retired assets	7,071	16,055	1,594
Change in liability for capital expenditures	(2,894)	31	172
Stock issued through dividend reinvestment plan	794	417	0
Stock based compensation	40
Accrued offering costs	2,759
Assumption of mortgage loan and other debt payable	54,130	0	0
Distributions payable	2,975	0
Transfers of property in extinguishment of debt settlement	101,800	0	0
Seller provided financing	12,000	0	0
Consolidation of 111 Sutter Street net assets in excess of cash paid	$ 52,845