Disclosure of Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2014

Debt Instrument, Fair Value Disclosure [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

The following summarizes the fair value of the Company's mortgage loans and unsecured notes as of December 31, 2013 and September 30, 2014 (in thousands):

	Mortgage Loans				Unsecured Notes
	Carrying Value		Fair Value		Carrying Value		Fair Value
As of December 31, 2013	$	545,306	$	573,944	$	2,708,213	$	2,764,831
As of September 30, 2014	$	534,547	$	550,722	$	2,508,886	$	2,634,931