Significant Accounting Policies Inventories (Policies)

12 Months Ended

Dec. 31, 2017

Inventories [Abstract]

Inventory, Policy [Policy Text Block]

Inventories

We carry our inventories at the lower of cost or market. We determine cost principally on the first-in, first-out basis, except for certain materials inventories of our Power segment, for which we use the last-in, first-out ("LIFO") method. We determined the cost of approximately 16% and 18% of our total inventories using the LIFO method at December 31, 2017 and 2016, respectively, and our total LIFO reserve at December 31, 2017 and 2016 was approximately $7.0 million and $7.0 million, respectively. The components of inventories can be found in Note 13.