Commitments and Contingencies Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Long-term Purchase Commitment [Table Text Block]

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

Years Ending December 31,	(in thousands)
2013	$	127,753
2014	111,674
2015	99,854
2016	102,540
2017	101,456
Thereafter	469,348
Total	$	1,012,625