Financing Arrangements (Narrative) (Details)							1 Months Ended		12 Months Ended						12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Interest rate swap USD ($)		Dec. 31, 2013 Interest rate swap USD ($)		Oct. 31, 2014 Long Term Note USD ($)	Dec. 31, 2014 U.S. Line Of Credit USD ($)	Dec. 31, 2014 Euro Line Of Credit USD ($)	Dec. 31, 2014 Euro Line Of Credit EUR (€)	Dec. 31, 2014 Euro Line Of Credit Russia USD ($)	Dec. 31, 2014 Euro Line Of Credit Germany USD ($)	Dec. 31, 2014 Euro Line Of Credit China USD ($)	Dec. 31, 2014 Euro Line Of Credit Italy USD ($)	Dec. 31, 2014 Euro Overdraft Facilities USD ($)	Dec. 31, 2014 Euro Overdraft Facilities EUR (€)	Dec. 31, 2014 European overdraft facilities USD ($) credit_line	Dec. 31, 2014 European overdraft facilities EUR (€)	Dec. 31, 2014 U.S. long-term note USD ($)	Dec. 31, 2014 Minimum U.S. Line Of Credit	Dec. 31, 2014 Minimum U.S. long-term note	Dec. 31, 2014 Maximum U.S. Line Of Credit	Dec. 31, 2014 Maximum U.S. long-term note	Dec. 31, 2014 Foreign Subsidiaries U.S. Line Of Credit USD ($)	Dec. 31, 2014 Interest rate swap U.S. long-term note	Dec. 31, 2014 Extended Term U.S. long-term note
Line of Credit Facility [Line Items]
Aggregate available principal under credit facility								$ 35,000,000	$ 36,466,000	€ 30,000,000	$ 19,448,000	$ 9,724,000	$ 3,647,000	$ 3,647,000	$ 608,000	€ 500,000	$ 1,823,000	€ 1,500,000
Percentage over LIBOR																				1.125%	0.90%	1.625%	1.30%
Total drawings under credit facility	2,631,000	3,296,000														395,000	433,000							14,100,000
Guarantor Obligations, Maximum Exposure, Undiscounted								87,000	4,309,000
Aggregate remaining availability								34,913,000	30,354,000							213,000	1,390,000
Interest rate on credit facility									1.00%	1.00%					1.00%	1.00%	1.00%	1.00%
Number of credit lines																	2	2
Monthly principal payments							167,000												111,000
Convertible interest rate percentage																									5.00%	2.57%
Debt service coverage ratio																			1.5
Outstanding derivative contracts			$ 11,333,000	[1]	$ 12,666,000	[1]
Interest rate percentage							2.81%

[1] Notional amounts represent the gross contract/notional amount of the derivative outstanding.