Investments In Unconsolidated Joint Ventures (Tables)

3 Months Ended

Mar. 31, 2012

Investments In Unconsolidated Joint Ventures [Abstract]

Investments In Unconsolidated Joint Ventures

Entity	Properties	Nominal % Ownership
Square 407 Limited Partnership	Market Square North		50.0	%
The Metropolitan Square Associates LLC	Metropolitan Square		51.0	%
BP/CRF 901 New York Avenue LLC	901 New York Avenue		25.0	%(1)
WP Project Developer LLC	Wisconsin Place Land and Infrastructure		33.3	%(2)
RBP Joint Venture LLC	Eighth Avenue and 46th Street		50.0	%(3)
Boston Properties Office Value-Added Fund, L.P.	300 Billerica Road and Mountain View Research and Technology Parks		37.6	%(1)(4)
Annapolis Junction NFM, LLC	Annapolis Junction		50.0	%(5)
767 Venture, LLC	The General Motors Building		60.0	%
2 GCT Venture LLC	Two Grand Central Tower		60.0	%(6)
540 Madison Venture LLC	540 Madison Avenue		60.0	%
125 West 55th Street Venture LLC	125 West 55th Street		60.0	%
500 North Capitol LLC	500 North Capitol Street, NW		30.0	%(7)

(1) The Company's economic ownership can increase based on the achievement of certain return thresholds.

(2) The Company's wholly-owned entity that owns the office component of the project owns a 33.3% interest in the entity owning the land and infrastructure of the project.

(3) This property is not in operation and consists of assembled land.

(4) Represents the Company's effective ownership interest. The Company has a 25.0% interest in the 300 Billerica Road property and a 39.5% interest in the Mountain View Research and Technology Park properties.

(5) Comprised of one building, one building under construction and two undeveloped land parcels.

(6) The property was sold on October 25, 2011. As of March 31, 2012, the investment is comprised of working capital and a portion of the sale proceeds.

(7) This property is under construction.

Balance Sheets Of The Unconsolidated Joint Ventures

	March 31, 2012			December 31, 2011
	(in thousands)
ASSETS
Real estate and development in process, net	$	4,536,222		$	4,542,594
Other assets		658,851			668,113
Total assets	$	5,195,073		$	5,210,707
LIABILITIES AND MEMBERS'/PARTNERS' EQUITY
Mortgage and notes payable	$	3,001,945		$	2,988,894
Other liabilities		829,981			854,257
Members'/Partners' equity		1,363,147			1,367,556
Total liabilities and members'/partners' equity	$	5,195,073		$	5,210,707
Company's share of equity	$	796,668		$	799,479
Basis differentials(1)		(129,291	)		(129,757	)
Carrying value of the Company's investments in unconsolidated joint ventures	$	667,377		$	669,722

(1) This amount represents the aggregate difference between the Company's historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from impairment of investments and upon the transfer of assets that were previously owned by the Company into a joint venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the joint venture level.

Statements Of Operations Of The Joint Ventures

	For the three months ended March 31,
	2012		2011
	(in thousands)
Total revenue(1)	$	139,100	$	145,645
Expenses
Operating		38,892		42,842
Depreciation and amortization		41,899		50,637
Total expenses		80,791		93,479
Operating income		58,309		52,166
Other expense
Interest expense		55,362		57,761
Net income (loss)	$	2,947	$	(5,595	)
Company's share of net income (loss)	$	1,371	$	(3,055	)
Basis differential		466		1,756
Elimination of inter-entity interest on partner loan		9,884		9,275
Income from unconsolidated joint ventures	$	11,721	$	7,976

(1) Includes straight-line rent adjustments of $4.3 million and $4.1 million for the three months ended March 31, 2012 and 2011, respectively. Includes net "below-" market rent adjustments of $25.3 million and $29.5 million for the three months ended March 31, 2012 and 2011, respectively.