Interest and Other Investment Income (Loss), Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Non-cash impairment loss on J.C. Penney common shares	$ (39,487)	$ (224,937)	$ 0
(Loss) income from the mark-to-market of J.C. Penney derivative position	(33,487)	(75,815)	12,984
Interest on mezzanine loans receivable	19,495	13,861	14,023
Dividends and interest on marketable securities	11,446	11,979	29,587
Mark-to-market of investments in our deferred compensation plan	10,636	6,809	1,658
Mezzanine loans loss reversal and net gain on disposition	0	0	82,744
Other, net	6,698	7,158	7,787
Interest and other investment (loss) income, net	$ (24,699)	$ (260,945)	$ 148,783