Derivative Instruments (tables)

9 Months Ended

Sep. 30, 2012

Summary of Derivative Instruments [Abstract]

Income Statement Presentation of Derivative Instruments [Text Block]



	Three Months Ended
	September 30, 2012						September 30, 2011
Thousands	Natural gas commodity⁽¹⁾			Foreign currency ⁽²⁾			Natural gas commodity⁽¹⁾			Foreign currency ⁽²⁾
Cost of sales	$	22,558		$	—		$	(18,987	)	$	—
Other comprehensive income (loss)	—			273			—			(1,221		)
Less:
Amounts deferred to regulatory accounts on balance sheet	(22,558		)	(273		)	18,987			1,221
Total impact on earnings	$	—		$	—		$	—		$	—



	Nine Months Ended
	September 30, 2012						September 30, 2011
Thousands	Natural gas commodity⁽¹⁾			Foreign currency ⁽²⁾			Natural gas commodity⁽¹⁾			Foreign currency ⁽²⁾
Cost of sales	$	(5,556	)	$	—		$	(49,106	)	$	—
Other comprehensive income (loss)	—			162			—			(815		)
Less:
Amounts deferred to regulatory accounts on balance sheet	5,556			(162		)	49,106			815
Total impact on earnings	$	—		$	—		$	—		$	—

Credit Rating Downgrade Scenarios [Text Block]



			Credit Rating Downgrade Scenarios
Thousands	(Current Ratings) A+/A3		BBB+/Baa1		BBB/Baa2		BBB-/Baa3		Speculative
With Adequate Assurance Calls	$	—	$	—	$	—	$	—	$	585
Without Adequate Assurance Calls	$	—	$	—	$	—	$	—	$	522

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

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