Debt and Other Financing (Details Textual) (USD $)							12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Loans payable to banks [Member]	Dec. 31, 2010 Loans payable to banks [Member]	Dec. 31, 2011 Domestic accounts receivable asset securitization program [Member]	Dec. 31, 2010 Domestic accounts receivable asset securitization program [Member]	Dec. 31, 2010 International accounts receivable sales without recourse programs [Member]	Dec. 31, 2011 International accounts receivable sales with recourse programs [Member]	Dec. 31, 2010 International accounts receivable sales with recourse programs [Member]
Short-term Debt [Line Items]
Weighted-average interest rate								3.00%
Maximum available in form of cash or letter of credit					$ 50,000,000
Additional availability under credit facility					50,000,000	50,000,000		0
Interest rate terms, basis								EURIBOR
Debt instrument, basis spread, Variable Rate								1.75%
Minimum principal outstanding of other debt obligations for credit facility cross default					5,000,000
Commitments to buy accounts receivable							30,100,000	18,100,000
Loans payable and current portion of long-term debt	11,241,000	3,580,000	404,000	709,000				8,150,000	0
Accounts receivable securing advances								11,700,000
Net proceeds received for outstanding receivables							3,400,000
Amount of outstanding receivables sold							6,800,000
Additional availability under programs							$ 0