Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Assets' estimated useful life

Depreciation and amortization of real estate assets and liabilities in place as of December 31, 2012, is provided for on a straight-line basis over the asset’s estimated useful life:

Land improvements	15.0 to 38.1 years
Buildings and improvements	3.3 to 39.0 years
Lease intangibles (including ground lease intangibles)	2.0 to 93.1 years
Personal property	3.0 to 15.8 years

Schedule of rental income

The components of rental income are as follows:

	Year Ended December 31,
(Dollars in thousands)	2012		2011		2010
Property operating income	$	241,902	$	218,254	$	186,127
Single-tenant net lease	53,809		53,856		50,369
Straight-line rent	5,344		4,602		2,541
Rental income	$	301,055	$	276,712	239,037

Other operating income

Other operating income on the Company’s Consolidated Statements of Operations was comprised of the following:

	Year Ended December 31,
(Dollars in millions)	2012		2011		2010
Property lease guaranty revenue	$	4.9	$	6.9	$	7.5
Interest income	0.5		0.6		0.8
Management fee income	0.2		0.2		0.2
Other	0.5		0.2		0.1
	$	6.1	7.9		8.6