Derivative Instruments (tables)

9 Months Ended

Sep. 30, 2014

Summary of Derivative Instruments [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

	September 30,				December 31,
In thousands	2014		2013		2013
Natural gas (in therms):
Financial	368,425		527,700		389,225
Physical	620,550		572,675		552,500
Foreign exchange	$	10,296	$	13,862	$	15,002

Income Statement Presentation of Derivative Instruments [Text Block]

	Three Months Ended September 30,
	2014						2013
In thousands	Natural gas commodity			Foreign currency			Natural gas commodity			Foreign currency
Benefit (expense) to cost of gas	$	(10,173	)	$	(421	)	$	2,422		$	502
Less:
Amounts deferred to regulatory accounts on the balance sheet	10,559			421			(2,433		)	(502		)
Total gain (loss) in pre-tax earnings	$	386		$	—		$	(11	)	$	—

	Nine Months Ended September 30,
	2014						2013
In thousands	Natural gas commodity			Foreign currency			Natural gas commodity			Foreign currency
Benefit (expense) to cost of gas	$	360		$	(242	)	$	(6,534	)	$	(11	)
Less:
Amounts deferred to regulatory accounts on the balance sheet	(93		)	242			6,599			11
Total gain in pre-tax earnings	$	267		$	—		$	65		$	—