CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 31,466	$ 19,002
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	70,109	70,398
Amortization of Deferred Financing Costs	2,360	2,468
Other Amortization	23,476	22,613
Impairment of Real Estate	0	2,652
Provision for Bad Debt	1,069	666
Equity in Income of Joint Ventures	(3,508)	(119)
Distributions from Joint Ventures	1,881	0
Gain on Sale of Real Estate	(14,483)	(16,203)
Loss from Retirement of Debt	655	6,248
Mark-to-Market Gain on Interest Rate Protection Agreements	0	(52)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(4,369)	(4,250)
Increase in Deferred Rent Receivable	(1,224)	(3,321)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(919)	(9,868)
Payments of Premiums, Discounts and Prepayment Penalties Associated with Retirement of Debt	(10,650)	(4,672)
Net Cash Provided by Operating Activities	95,863	85,562
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(53,211)	(47,293)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(83,818)	(85,168)
Net Proceeds from Sales of Investments in Real Estate	56,622	65,814
Contributions to and Investments in Joint Ventures	(28)	(26)
Distributions from Joint Ventures	2,469	0
Repayments of Notes Receivable	49,761	454
(Increase) Decrease in Escrows	(515)	979
Net Cash Used in Investing Activities	(28,720)	(65,240)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance and Redemption Costs	(2,411)	(3,567)
Proceeds from the Issuance of Common Stock, Net of Underwriter’s Discount	0	174,081
Repurchase and Retirement of Restricted Stock	(4,667)	(2,968)
Common Stock and Unit Distributions Paid	(33,367)	(19,286)
Preferred Dividends Paid	(1,471)	(7,958)
Redemption of Preferred Stock	(75,000)	(150,000)
Payments on Interest Rate Protection Agreements	0	(865)
Repayments on Mortgage Loans Payable	(74,944)	(50,565)
Repayments of Senior Unsecured Notes	(71,578)	(29,769)
Proceeds from Unsecured Term Loan	200,000	0
Proceeds from Unsecured Credit Facility	307,000	289,000
Repayments on Unsecured Credit Facility	(304,000)	(216,000)
Net Cash Used in Financing Activities	(60,438)	(17,897)
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	(23)	(20)
Net Increase in Cash and Cash Equivalents	6,705	2,425
Cash and Cash Equivalents, Beginning of Year	7,577	4,938
Cash and Cash Equivalents, End of Year	$ 14,259	$ 7,343