Commitments And Contingencies (Narrative) (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2013 claim	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2014 Scenario, Forecast [Member]	Mar. 31, 2014 Scenario, Forecast [Member] Tyson Foods, Inc [Member]
Loss Contingencies [Line Items]
Lease expiration	2014
Rental expense	$ 94,000	$ 99,000	$ 181,000
Total future minimum lease payments	23,000
Commitments under employment agreements, severance benefits	2,121,000
Joint venture, guaranty responsibility percentage				50.00%
Joint venture, guaranty responsibility amount				50,000,000
Guarantee of Dynamic Fuels bonds					$ 100,000,000
Number of claims filed	3