Mezzanine Equity (Schedule Of Redeemable Noncontrolling Interests) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Redeemable Noncontrolling Interest [Roll Forward]
As of January 1,			$ 186,686
Income (loss) allocated to redeemable noncontrolling interests	$ (6,788)	$ 5,625	(15,931)	$ 966
Increase (decrease) in fair value of redeemable noncontrolling interests credited to additional paid-in capital			(8,306)	10,588
Balance, September 30,	179,061		179,061
National Beef [Member]
Redeemable Noncontrolling Interest [Roll Forward]
As of January 1,			184,333	241,075
Income (loss) allocated to redeemable noncontrolling interests			(15,868)	966
Net distributions to redeemable noncontrolling interests			0	(2,765)
Increase (decrease) in fair value of redeemable noncontrolling interests credited to additional paid-in capital			8,306	(10,588)
Balance, September 30,	$ 176,771	$ 228,688	$ 176,771	$ 228,688