v2.4.0.8
Segment Information (Schedule Of Reconciliation Of Net Operating Income To Net Income) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Operating Income $ 170,815 $ 173,319 $ 301,250 $ 316,886
Development and management services income 7,857 9,564 16,593 17,709
Income from unconsolidated joint ventures 48,783 21,191 57,504 32,912
Gain on consolidation of joint ventures 387,801 0 387,801 0
Interest and other income 1,296 2,382 2,767 4,028
Gains (losses) from investments in securities 181 (186) 916 615
Gains from early extinguishments of debt 152 274 152 1,041
Gain on sale of real estate from discontinued operations 0 36,877 0 36,877
Gain on forgiveness of debt from discontinued operations 0 0 20,182 0
General and administrative expense 22,194 19,066 65,765 46,685
Transaction costs 535 8 978 2,112
Depreciation and amortization expense 134,604 111,168 255,199 219,630
Interest expense 103,140 99,901 203,573 203,138
Impairment loss 0 0 8,306 0
Impairment loss from discontinued operations 0 0 3,241 0
Noncontrolling interest in property partnerships (219) 457 2,355 1,003
Noncontrolling interest-redeemable preferred units of the Operating Partnership 1,123 765 2,303 1,566
Noncontrolling interest-common units of the Operating Partnership 50,734 10,318 55,277 16,310
Noncontrolling interest in discontinued operations-common units of the Operating Partnership 88 4,075 1,900 4,159
Net income attributable to Boston Properties, Inc. 455,035 118,559 502,857 166,971
Business Intersegment, Eliminations [Member]
        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Operating Income 320,291 293,997 614,905 567,604
Development and management services income 7,857 9,564 16,593 17,709
Income from unconsolidated joint ventures 48,783 21,191 57,504 32,912
Gain on consolidation of joint ventures 387,801 0 387,801 0
Interest and other income 1,296 2,382 2,767 4,028
Gains (losses) from investments in securities 181 (186) 916 615
Gains from early extinguishments of debt 152 274 152 1,041
Income from discontinued operations 873 218 934 788
Gain on sale of real estate from discontinued operations 0 36,877 0 36,877
Gain on forgiveness of debt from discontinued operations 0 0 20,182 0
General and administrative expense 22,194 19,066 65,765 46,685
Transaction costs 535 8 978 2,112
Depreciation and amortization expense 134,604 111,168 255,199 219,630
Interest expense 103,140 99,901 203,573 203,138
Impairment loss 0 0 8,306 0
Impairment loss from discontinued operations 0 0 3,241 0
Noncontrolling interest in property partnerships (219) 457 2,355 1,003
Noncontrolling interest-redeemable preferred units of the Operating Partnership 1,123 765 2,303 1,566
Noncontrolling interest-common units of the Operating Partnership 50,734 10,318 55,277 16,310
Noncontrolling interest in discontinued operations-common units of the Operating Partnership 88 4,075 1,900 4,159
Net income attributable to Boston Properties, Inc. $ 455,035 $ 118,559 $ 502,857 $ 166,971