Marketable Securities and Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Unrealized Gain (Loss) on Investments [Abstract]

Unrealized Gain (Loss) on Investments [Table Text Block]

	Below is a summary of our marketable securities portfolio as of December 31, 2014 and 2013.
		As of December 31, 2014						As of December 31, 2013
				GAAP		Unrealized				GAAP		Unrealized
		Fair Value		Cost		Gain		Fair Value		Cost		Gain
Equity securities:
	Lexington Realty Trust	$	202,789	$	72,549	$	130,240	$	188,567	$	72,549	$	116,018
	Other		3,534		-		3,534		3,350		59		3,291
		$	206,323	$	72,549	$	133,774	$	191,917	$	72,608	$	119,309