Marketable Securities and Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Marketable Securities and Derivative Instruments Tables [Abstract]

Schedule of Marketable Securities and Derivative Instruments

		As of March 31, 2012							As of December 31, 2011
					GAAP		Unrealized					GAAP		Unrealized
		Maturity	Fair Value		Cost		Gain		Maturity	Fair Value		Cost		Gain
Equity securities:
	J.C. Penney	n/a	$	658,431	$	591,069	$	67,362	n/a	$	653,228	$	591,069	$	62,159
	Other	n/a		36,503		13,561		22,942	n/a		29,544		13,561		15,983
Debt securities		04/13 - 10/18		59,576		55,460		4,116	04/13 - 10/18		58,549		54,965		3,584
			$	754,510	$	660,090	$	94,420		$	741,321	$	659,595	$	81,726