Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Table Text Block [Abstract]

Summary of long-term commitments which require future minimum rental payments

The following table summarizes by year the remaining non-cancelable future payments under these leases as of December 31, 2012:

In thousands	Pipeline Financing Leases			Capital Leases			Operating Leases
2013	$	30,817		$	35,429		$	10,656
2014	31,992			31,629			11,452
2015	32,591			30,139			12,300
2016	31,233			28,038			12,384
2017	30,678			22,052			12,720
Thereafter	296,226			31,806			80,562
Total minimum lease payments	453,537			179,093			$	140,074
Less: Amount representing interest	(217,293		)	(20,833		)
Present value of minimum lease payments	$	236,244		$	158,260