Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001339048 (http://www.sec.gov/CIK)

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Assets, Noncurrent [Table Text Block]	Other assets were as follows:   December 31,   2016   2015   (In thousands) Capital spare parts $ 12,717   $ 8,112 Purchase agreement 9,762   16,067 Cost method investment 7,864   7,872 Notes receivable 4,366   4,586 Deposits 3,582   3,747 Fair value of open commodity hedging positions, net 8   11,881 Other 9,159   12,732 Other assets $ 47,458   $ 64,997