CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Net (loss) income	$ (33,292)	$ 29,382
Depreciation	100,584	99,163
Amortization	7,083	9,932
Straight-line rent adjustments	(1,164)	(1,032)
Provision for doubtful accounts	1,779	1,872
Amortization of deferred compensation	6,971	6,246
Loss on Hedge Ineffectiveness	1,354	3,409
Gains (Losses) on Sales of Investment Real Estate	414	0
Net losses (gains) on sales of interests in real estate	0	(78,351)
Equity in income of partnerships, net of distributions	(1,976)	(2,496)
Amortization Of Historic Tax Credits Related To Cash Flow	2,508	2,494
Impairment of assets and expensed project costs	20,125	30,416
Change in assets and liabilities:
Net change in other assets	4,014	(5,051)
Net change in other liabilities	(4,872)	(6,470)
Net cash provided by operating activities	98,512	84,526
Cash flows from investing activities:
Investments in consolidated real estate acquisitions	(20,000)	(60,879)
Additions to construction in progress	(30,745)	(24,524)
Investments in real estate improvements	(40,649)	(25,191)
Cash proceeds from sales of real estate	165,632	173,280
Additions to leasehold improvements	(953)	(212)
Investments in partnerships	(5,158)	(207)
Capitalized leasing costs	(4,223)	(3,902)
(Increase) decrease in cash escrows	(318)	1,600
Cash distributions from partnerships in excess of equity in income	1,537	1,257
Net cash provided by investing activities	65,123	61,222
Cash flows from financing activities:
Borrowings from (repayments of) term loans	130,000	(182,000)
Net (repayments of) borrowings from revolving facility	(130,000)	90,000
Proceeds from mortgage loans		76,692
Principal installments on mortgage loans	(11,812)	(12,698)
Repayments of mortgage loans	(76,784)	(294,514)
Payment of deferred financing costs	(1,896)	(3,764)
Dividends paid to common shareholders	(41,225)	(34,674)
Dividends paid to preferred shareholders	(11,886)	(11,886)
Distributions paid to Operating Partnership unit holders	(1,278)	(1,198)
Value of shares of beneficial interest issued	3,062	1,315
Value of shares retired under equity incentive plans, net of shares issued	(4,633)	(2,418)
Net cash used in financing activities	(146,452)	(154,845)
Net change in cash and cash equivalents	17,183	(9,097)
Cash and cash equivalents, beginning of period	34,230	33,990
Cash and cash equivalents, end of period	51,413
Proceeds from Issuance of Common Stock	$ 0	$ 220,300