Segment Reporting, Asset reconciliation (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Reconciliation of assets by segment [Abstract]
Total assets	$ 592,271	$ 598,422
Wheels [Member]
Reconciliation of assets by segment [Abstract]
Total assets	437,196	441,835
Gunite [Member]
Reconciliation of assets by segment [Abstract]
Total assets	59,944	59,600
Brillion Iron Works [Member]
Reconciliation of assets by segment [Abstract]
Total assets	50,358	55,226
Corporate / Other [Member]
Reconciliation of assets by segment [Abstract]
Total assets	$ 44,773	$ 41,761