Financial Instruments And Risk Management (Tables)

12 Months Ended

Dec. 31, 2013

Financial Instruments And Risk Management [Abstract]

Fair Value Of Derivative Instruments Not Designated As Hedging Instruments

December 31, 2013

December 31, 2012

Asset Derivatives

Liabilitiy Derivatives

Asset Derivatives

Liabilitiy Derivatives

Balance

Balance

Balance

Balance

Sheet

Fair

Sheet

Fair

Sheet

Fair

Sheet

Fair

(Thousands of dollars)

Location

Value

Location

Value

Location

Value

Location

Value

Commodity derivative contracts

Accounts

Accounts

Accounts

Accounts

Receivable

$

224

Payable

$

291

Receivable

$

3,043

Payable

$

102

Recognized Gains And Losses For Derivative Instruments Not Designated As Hedging Instruments

		Amount of Gain (Loss) Recognized
			in Income on Derivative
(Thousands of dollars)	Statement of Income
Type of Derivative Contract	Location		2013		2012
Commodity	Fuel and ethanol costs
	of goods sold		$	8,516	$	(38,283)

Summary Of Offsetting Assets

			Gross Amounts		Net Amounts of
	Gross Amounts		Offset in the		Assets Presented in
	of Recognized		Combined		the Combined
(Thousands of dollars)	Assets		Balance Sheet		Balance Sheet
At December 31, 2013
Commodity derivatives	$	233	$	(9)	$	224
At December 31, 2012
Commodity derivatives	$	6,727	$	(3,684)	$	3,043

Summary Of Offsetting Liabilities

			Gross Amounts		Net Amounts of
	Gross Amounts		Offset in the		Liabilities Presented
	of Recognized		Consolidated		in the Consolidated
(Thousands of dollars)	Liabilities		Balance Sheet		Balance Sheet
At December 31, 2013
Commodity derivatives	$	300	$	(9)	$	291
At December 31, 2012
Commodity derivatives	$	3,786	$	(3,684)	$	102