v2.4.0.8
Investments in Unconsolidated Joint Ventures (Statements of Operations of the Joint Ventures) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]        
Total revenue $ 618,803,000 $ 571,481,000 $ 1,783,291,000 $ 1,559,340,000
Expenses        
Depreciation and amortization 157,245,000 153,253,000 466,143,000 406,162,000
Total expenses 404,000,000 384,728,000 1,190,318,000 1,076,212,000
Operating income 214,803,000 186,753,000 592,973,000 483,128,000
Other expense        
Interest expense 113,308,000 122,173,000 337,839,000 325,746,000
Losses on Extinguishment of Debt 0 30,000 0 (122,000)
Income from continuing operations 109,038,000 82,311,000 272,695,000 624,253,000
Net income 150,975,000 170,436,000 314,632,000 735,128,000
Income from unconsolidated joint ventures 4,419,000 14,736,000 10,069,000 72,240,000
Gains on consolidation of joint ventures 0 (1,810,000) 0 385,991,000
Unconsolidated Joint Ventures [Member]
        
Schedule of Equity Method Investments [Line Items]        
Total revenue 41,958,000 [1] 37,983,000 [1] 118,429,000 [1] 273,464,000 [1]
Expenses        
Operating 15,516,000 14,963,000 46,441,000 89,826,000
Depreciation and amortization 9,429,000 9,784,000 27,688,000 76,202,000
Total expenses 24,945,000 24,747,000 74,129,000 166,028,000
Operating income 17,013,000 13,236,000 44,300,000 107,436,000
Other expense        
Interest expense 7,950,000 8,148,000 23,946,000 104,436,000
Losses on Extinguishment of Debt 0 0 0 1,677,000
Income from continuing operations 9,063,000 5,088,000 20,354,000 1,323,000
Gain on sale or real estate 0 12,441,000 0 14,207,000
Net income 9,063,000 17,529,000 20,354,000 15,530,000
Company's share of net income (loss) 4,200,000 3,149,000 9,403,000 1,974,000
Gain on sale of real estate 0 11,174,000 0 54,501,000
Basis differential 219,000 413,000 666,000 (1,213,000)
Elimination of inter-entity interest on partner loan 0 0 0 16,978,000
Income from unconsolidated joint ventures 4,419,000 14,736,000 10,069,000 72,240,000
Gains on consolidation of joint ventures 0 (1,810,000) 0 385,991,000
Straight-line rent adjustments 200,000 600,000 1,100,000 7,600,000
"Above" and "below" market rent adjustments, net $ (100,000) $ (100,000) $ (100,000) $ 33,900,000
[1] Includes straight-line rent adjustments of $0.2 million and $0.6 million for the three months ended September 30, 2014 and 2013, respectively, and $1.1 million and $7.6 million for the nine months ended September 30, 2014 and 2013, respectively. Includes net below-market rent adjustments of $(0.1) million and $(0.1) million for the three months ended September 30, 2014 and 2013, respectively, and $(0.1) million and $33.9 million for the nine months ended September 30, 2014 and 2013, respectively.