Segment Reporting, Asset reconciliation (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Reconciliation of assets by segment [Abstract]
Total assets	$ 626,756	$ 611,777
Wheels [Member]
Reconciliation of assets by segment [Abstract]
Total assets	466,969	452,271
Gunite [Member]
Reconciliation of assets by segment [Abstract]
Total assets	64,729	55,016
Brillion Iron Works [Member]
Reconciliation of assets by segment [Abstract]
Total assets	56,751	52,547
Corporate / Other [Member]
Reconciliation of assets by segment [Abstract]
Total assets	$ 38,307	$ 51,943