Disclosure of Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2016

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, 2015 and March 31, 2016 (in thousands):

	Mortgage Loans				Unsecured Notes
	Carrying Value		Fair Value		Carrying Value		Fair Value
As of December 31, 2015	$	307,908	$	306,334	$	2,580,108	$	2,616,395
As of March 31, 2016	$	304,360	$	302,783	$	2,580,910	$	2,719,746