Debt (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summarizes the Company's debt
Total debt	$ 60,449	$ 76,247
Current portion	(15,091)	(14,570)
Long-term debt, less current maturities	45,358	61,677
US Term Note [Member]
Summarizes the Company's debt
Total debt	31,500	33,250
Interest Rate	3.46%
Europe Term Note [Member]
Summarizes the Company's debt
Total debt	4,264	4,389
Interest Rate	3.46%
W.E.T. Term Note [Member]
Summarizes the Company's debt
Total debt	22,345	34,903
Interest Rate	3.56%
Bank of China [Member]
Summarizes the Company's debt
Total debt
Interest Rate
Capital Leases [Member]
Summarizes the Company's debt
Total debt	$ 2,340	$ 3,705
Interest Rate	5.50%