Related Parties (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
UES-UK [Member]
Related Parties (Textual) [Abstract]
UES-UK interest in cast roll joint venture company	25.00%
UES [Member]
Related Parties (Textual) [Abstract]
Percentage of ownership in joint venture	49.00%
Commission earned	$ 74	$ 191
Commission outstanding	14	50
LB Co [Member]
Related Parties (Textual) [Abstract]
Purchases	1,538	1,579	1,752
Net amount payable	61	57
LB Co paid Corporation for administrative services	253	246	239
Chinese cast roll [Member]
Related Parties (Textual) [Abstract]
Purchases	455	480	449
Net amount payable	$ 0	$ 108