Commitments and Contingencies (tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule Of Future Minimum Lease Payments For Operating And Capital Leases [Table Text Block]

In thousands	Operating leases		Capital leases		Minimum lease payments
2014	$	5,611	$	462	$	6,073
2015	5,530		196		5,726
2016	5,510		82		5,592
2017	5,506		12		5,518
2018	2,858		—		2,858
Thereafter	34,836		—		34,836
Total	$	59,851	$	752	$	60,603

Long-term Purchase Commitment [Table Text Block]

In thousands	Gas Purchase Agreements		Pipeline Capacity Purchase Agreements		Pipeline Capacity Release Agreements
2014	$	60,692	$	94,923	$	3,739
2015	—		77,433		—
2016	—		66,146		—
2017	—		52,084		—
2018	—		42,263		—
Thereafter	—		216,995		—
Total	60,692		549,844		3,739
Less: Amount representing interest	20		113,437		—
Total at present value	$	60,672	$	436,407	$	3,739