Impaired Asset		Method of Determining Fair Value	Total Fair Value Measurement Year Ended December 31, 2010		Total Loss Year Ended December 31, 2010

			(In thousands)
Master Planned Communities:
Maryland – Gateway (e)	Howard County, MD	Projected sales price analysis (a) (c)	$	1,649	$	2,613
Maryland – Columbia (e)	Columbia, MD	Projected sales price analysis (a) (c)		34,823		56,798
Summerlin – South (e)	Las Vegas, NV	Projected sales price analysis (a) (c)		203,325		345,920

				239,797		405,331

Operating Assets:
Landmark (e)	Alexandria, VA	Discounted cash flow analysis (a) (c)		23,750		24,434
Riverwalk Marketplace (g)	New Orleans, LA	Discounted cash flow analysis (c)		10,179		55,975
Various pre-development costs		(b)		—		514

				33,929		80,923

Strategic Developments:
Century Plaza Mall (f)	Birmingham, AL	Projected sales price analysis (a) (d)		4,500		12,899
Nouvelle at Natick (e)	Natick, MA	Discounted cash flow analysis (c)		13,413		4,135
Various pre-development costs		(b)		—		68

				17,913		17,102

Total			$	291,639	$	503,356

(a): Projected sales price analysis incorporates available market information and other management assumptions.
(b): Related to the write-down of various pre-development costs that were determined to be non-recoverable due to the related projects being terminated.
(c): These impairments were primarily driven by the carrying value of the assets, including costs expected to be incurred, not being recoverable by the projected sales price of such assets.

(d): These impairments were primarily driven by management's changes in current plans with respect to the property and measured based on the value of the underlying land, which is based on comparable property market analysis or a projected sales price analysis that incorporates available market information and other management assumptions as these properties are either no longer operational or operating with no or nominal income.
(e): The fair value was calculated on a discounted cash flow analysis using a discount rate of 20.0%.
(f): The fair value is based on estimated sales value.
(g): The fair value was calculated based on a discounted cash flow analysis using a property specific discount rate and a residual capitalization rate of 8.5% for both computations.