Fair Value Measurements (Narrative) (Details) (Weighted Average [Member], Fair Value, Measurements, Recurring [Member], Significant Unobservable Inputs (Level 3) [Member])	Sep. 30, 2014	Dec. 31, 2013
Inventory Related Payables [Member]
Fair Value Measurements [Line Items]
Basis	30.80%	13.20%
Inventories Carried At Market [Member]
Fair Value Measurements [Line Items]
Basis	32.10%	21.90%