Three months ended
September 30,

Nine months ended
September 30,

2011

2010

2011

2010

Net Operating Income

$

283,216

$

245,736

$

824,150

$

730,194

Add:

Development and management services income

8,180

6,439

24,706

34,267

Income from unconsolidated joint ventures

11,326

11,565

28,184

26,940

Interest and other income

1,252

1,814

4,179

5,641

Gains on sales of real estate

—

2,734

Less:

General and administrative expense

17,340

18,067

62,052

62,537

Acquisition costs

51

1,893

136

1,893

Suspension of development

—

(7,200

)

Depreciation and amortization expense

109,495

81,133

330,003

245,608

Losses (gains) from investments in securities

860

(731

)

481

(253

)

Interest expense

95,777

97,103

290,164

285,887

Losses from early extinguishments of debt

—

8,221

Noncontrolling interest in property partnerships

86

889

1,118

2,557

Noncontrolling interest—redeemable preferred units of the Operating Partnership

832

820

2,497

2,548

Noncontrolling interest—common units of the Operating Partnership

8,991

8,712

23,409

25,841

Noncontrolling interest in gains on sales of real estate—common units of the Operating Partnership

—

351

Net income attributable to Boston Properties, Inc.

$

70,542

$

57,668

$

171,359

$

171,786