Commitments and Contingencies Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Long-term Purchase Commitment [Table Text Block]

The annual minimum payments for the next five years and total minimum payments thereafter are presented below:

Years Ending December 31,	(in thousands)
2015	$	224,897
2016	147,896
2017	118,320
2018	128,866
2019	132,920
Thereafter	383,619
Total	$	1,136,518