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Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Basis of Presentation and Significant Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]



Asset Description	Depreciable Lives
Buildings and improvements	25 – 40 years
Tenant improvements	1 – 20 years⁽¹⁾

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(1)	Tenant improvements are amortized over the shorter of the lease term or the estimated useful life.

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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