Segment Reporting, Asset reconciliation (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Reconciliation of assets by segment [Abstract]
Total assets	$ 598,891	$ 598,422
Wheels [Member]
Reconciliation of assets by segment [Abstract]
Total assets	448,768	441,835
Gunite [Member]
Reconciliation of assets by segment [Abstract]
Total assets	60,634	59,600
Brillion Iron Works [Member]
Reconciliation of assets by segment [Abstract]
Total assets	55,612	55,226
Corporate / Other [Member]
Reconciliation of assets by segment [Abstract]
Total assets	$ 33,877	$ 41,761