Business Segments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 181,330,000	$ 181,674,000
Operating Earnings, Excluding Indirect Operating Expenses	36,082,000	35,234,000
Reconciliation from Segment Totals to Consolidated [Abstract]
Indirect Operating Expenses	(16,591,000)	(15,048,000)
Amortization	(1,627,000)	(813,000)
Operating income	17,864,000	19,373,000
Other Income (Expense), net	(194,000)	(473,000)
Interest Expense	(587,000)	(525,000)
Interest Income	320,000	453,000
Income Before Taxes and Equity in Net Income of Associated Companies	17,403,000	18,828,000
North America [Member]
Segment Reporting Information [Line Items]
Net Sales	83,002,000	76,716,000
Operating Earnings, Excluding Indirect Operating Expenses	17,825,000	15,711,000
North America [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	2,020,000	1,950,000
EMEA [Member]
Segment Reporting Information [Line Items]
Net Sales	43,185,000	49,189,000
Operating Earnings, Excluding Indirect Operating Expenses	6,571,000	8,096,000
EMEA [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	4,779,000	5,326,000
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales	45,000,000	41,937,000
Operating Earnings, Excluding Indirect Operating Expenses	10,434,000	9,918,000
Asia Pacific [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	94,000	107,000
South America [Member]
Segment Reporting Information [Line Items]
Net Sales	10,143,000	13,832,000
Operating Earnings, Excluding Indirect Operating Expenses	1,252,000	1,509,000
South America [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 9,000	$ 0