Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Assets' estimated useful life

Depreciation and amortization of real estate assets and liabilities in place as of December 31, 2015, 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)	1.9 to 93.1 years
Personal property	1.5 to 17.3 years

Schedule of rental income

The components of rental income are as follows:

	Year Ended December 31,
(Dollars in thousands)	2015		2014		2013
Property operating income	$	306,550	$	285,304	$	251,403
Single-tenant net lease	67,238		65,252		51,467
Straight-line rent	9,545		10,969		9,452
Rental income	$	383,333	$	361,525	$	312,322

Other operating income

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

	Year Ended December 31,
(Dollars in thousands)	2015		2014		2013
Property lease guaranty revenue	$	3,890	$	4,430	$	5,114
Interest income	579		731		457
Management fee income	370		289		164
Other	208		215		191
	$	5,047	$	5,665	$	5,926