Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Table Text Block [Abstract]

Schedule of operating lease payments paid and received

The following table summarizes operating lease payments paid and sublease rentals received during the periods indicated:

	Year Ended December 31,
In thousands	2017		2016		2015
Operating lease payments	$	25,075	$	22,744	$	29,403
Sublease rental receipts	4,275		3,074		3,698

Schedule of capital long-term commitments which require future minimum rental payments

The following tables summarize by year the remaining non-cancelable future payments under our leases as of December 31, 2017:

In thousands	Pipeline and Capital Leases
2018	$	43,105
2019	40,215
2020	27,872
2021	26,092
2022	27,827
Thereafter	137,342
Total minimum lease payments	302,453
Less: Amount representing interest	(83,726		)
Present value of minimum lease payments	$	218,727

Schedule of operating long-term commitments which require future minimum lease payments

In thousands	Operating Leases
2018	$	11,315
2019	10,675
2020	9,787
2021	10,020
2022	10,255
Thereafter	28,799
Total minimum lease payments	$	80,851