Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss	$ (16,437,000)	$ (14,434,000)
Adjustments to Reconcile Net Loss to Net Cash Flows Provided by Operating Activities:
Equity in Income of Unconsolidated Entities	(2,556,000)	(4,160,000)
Distributions from Unconsolidated Entities	30,503,000	17,200,000
Gain on Interest Rate Swaps	(380,000)	(177,000)
Loss (Gain) on Note Payable at Fair Value	85,000	(41,000)
Loss on Early Extinguishment of Debt	1,191,000	0
Net Realized Loss on Sale of Real Property	415,000	(301,000)
Depreciation and Amortization of Building and Improvements	32,707,000	26,524,000
Amortization of Deferred Financing Costs	1,433,000	1,426,000
Amortization of Acquired In-Place Lease Value	21,544,000	17,055,000
Amortization of Above and Below Market Leases	1,311,000	1,487,000
Amortization of Lease Commissions	499,000	322,000
Amortization of Discount (Premium) on Notes Payable	(993,000)	(219,000)
Share Based Compensation	215,000	28,000
Changes in Assets and Liabilities:
Accounts and Other Receivables	(3,825,000)	(604,000)
Deferred Rent	(5,473,000)	(7,270,000)
Other Assets	(2,011,000)	7,000
Accounts Payable, Accrued Expenses and Prepaid Rent	27,546,000	5,752,000
Investment and Property Management Fees Payable to Related Party	197,000	665,000
Net Cash Flows Provided By Operating Activities	85,971,000	43,260,000
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of Real Property	(127,300,000)	(152,943,000)
Proceeds from Sale of Real Property	2,885,000	23,596,000
Investments in Unconsolidated Entities	(12,793,000)	(79,073,000)
Distributions from Unconsolidated Entities	32,468,000	0
Restricted Cash	(1,868,000)	(3,951,000)
Lease Commissions	(1,194,000)	(2,134,000)
Improvements to Investments in Real Estate	(39,274,000)	(8,222,000)
Net Cash Flows Used in Investing Activities	(147,076,000)	(222,727,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Common Shares-Public Offering	172,000	433,000
Proceeds from Additional Paid-in-Capital-Public Offering	171,086,000	432,455,000
Redemption of Common Shares	(35,888,000)	(25,477,000)
Payment of Offering Costs	(20,444,000)	(47,420,000)
Payment of Distributions	(58,373,000)	(43,561,000)
Distribution to Non-Controlling Interest Operating-Partnership Units	(111,000)	(111,000)
Contribution from Non-Controlling Interest-Variable Interest Entity	140,000	0
Borrowing on Loan Payable	0	50,000,000
Principal Payment on Loan Payable	(25,000,000)	(85,000,000)
Proceeds from Notes Payable	0	81,700,000
Principal Payments on Notes Payable	(11,058,000)	(50,324,000)
Deferred Financing Costs	(6,394,000)	(2,188,000)
Security Deposits	259,000	(206,000)
Net Cash Flows Provided by Financing Activities	14,389,000	310,301,000
EFFECT OF FOREIGN CURRENCY TRANSLATION	(153,000)	(253,000)
Net (Decrease) Increase in Cash and Cash Equivalents	(46,868,000)	130,581,000
Cash and Cash Equivalents, Beginning of the Period	238,277,000	48,218,000
Cash and Cash Equivalents, End of the Period	191,409,000	178,799,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash Paid During the Period for Interest	24,714,000	22,577,000
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Distributions Declared and Payable	37,374,000	29,911,000
Proceeds from Dividend Reinvestment Program	48,505,000	32,924,000
Application of Deposit to Investment in Unconsolidated Entities	0	7,500,000
Application of Deposit to Investment in Real Estate	0	12,500,000
Accrued Acquisition Cost Related to Real Property	0	100,000
Duke joint venture Contribution/Distribution-Amazon Expansion	921,000	19,605,000
Notes Payable Assumed on Acquisitions of Real Estate	0	238,419,000
Share Awards Increase in Additional Paid-In-Capital	215,000	28,000
Accrued Offering Cost	0	1,555,000
Accounts Payable and Accrued Expenses-Construction in Progress	$ 12,763,000	$ 0