Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Schedule of fixed asset useful lives [Table Text Block]

Depreciation expense is computed using the straight-line method based upon the following estimated useful lives:

Asset Category	Estimated Useful Life
Buildings and improvements	40-50 Years
Tenant improvements	Life of related lease
Equipment and fixtures	2-10 Years

Maintenance and repairs are charged to expense when incurred. Expenditures for significant betterments and improvements are capitalized.

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Future amortization related to amortizing acquired intangible assets and liabilities as of December 31, 2012 is as follows:

	Acquired in-place leases		Acquired above-market leases		Below- market ground leases		Acquired below-market leases
2013	$	8,047	$	451	$	146	$	(2,605	)
2014	7,491		357		146		(2,083		)
2015	7,242		287		146		(1,611		)
2016	2,999		145		146		(1,366		)
2017	1,573		76		146		(730		)
Thereafter	2,853		25		8,849		(1,685		)
	$	30,205	$	1,341	$	9,579	$	(10,080	)

Income Taxes