v2.4.0.6
Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net income $ 57,931 $ 55,835
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 121,191 109,865
Non-cash compensation expense 25,783 11,358
Impairment loss 8,306 0
Income from unconsolidated joint ventures (8,721) (11,721)
Distributions of net cash flow from operations of unconsolidated joint ventures 12,921 8,972
Gains from investments in securities (735) (801)
Non-cash portion of interest expense 10,561 11,845
Settlement of accreted debt discount on repurchases of unsecured exchangeable senior notes 0 (68,760)
Gains from early extinguishments of debt 0 (914)
Gain on forgiveness of debt from discontinued operations (20,182) 0
Impairment loss from discontinued operations 3,241 0
Change in assets and liabilities:    
Cash held in escrows (297) 9,113
Tenant and other receivables, net 10,690 22,686
Accrued rental income, net (14,295) (19,240)
Prepaid expenses and other assets 18,684 7,020
Accounts payable and accrued expenses (1,172) 1,563
Accrued interest payable 30,158 31,490
Other liabilities (7,703) 8,883
Tenant leasing costs (8,932) (7,933)
Total adjustments 179,498 113,426
Net cash provided by operating activities 237,429 169,261
Cash flows from investing activities:    
Acquisitions of real estate (289,816) (621,359)
Construction in progress (103,178) (93,657)
Building and other capital improvements (14,162) (8,613)
Tenant improvements (24,988) (34,912)
Issuance of notes receivable 184 (735)
Capital contributions to unconsolidated joint ventures (113) (47)
Capital distributions from unconsolidated joint ventures 0 57
Investments in securities, net (918) (844)
Net cash used in investing activities (432,991) (760,110)
Cash flows from financing activities:    
Repayments of mortgage notes payable (23,687) (150,519)
Redemption/repurchase of unsecured exchangeable senior notes 0 (507,434)
Deferred financing costs 0 (91)
Proceeds from Issuance of Preferred Stock and Preference Stock 194,371  
Net proceeds from ATM stock issuances 0 109,330
Net proceeds from equity transactions (559) 613
Dividends and distributions (110,940) (92,312)
Proceeds from noncontrolling interests in property partnership 5,875 0
Distributions to noncontrolling interest in property partnerships (2,100) (750)
Net cash provided by (sued in) financing activities 62,960 (641,163)
Net decrease in cash and cash equivalents (132,602) (1,232,012)
Cash and cash equivalents, beginning of period 1,041,978 1,823,208
Cash and cash equivalents, end of period 909,376 591,196
Supplemental disclosures:    
Cash paid for interest 74,492 140,508
Interest capitalized 14,418 11,201
Non-cash investing and financing activities:    
Additions to real estate included in accounts payable and accrued expenses 7,475 5,659
Mortgage note payable extinguished through foreclosure 25,000 0
Real estate transferred upon foreclosure 7,508 0
Land improvements contributed by noncontrolling property partnership 4,546 0
Dividends and distributions declared but not paid 110,886 92,615
Conversions of noncontrolling interests to stockholders' equity 272 6,026
Conversion of redeemable preferred units to common units 0 4,115
Issuance of restricted securities to employees and directors $ 25,901 $ 26,139