Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 181,674	$ 176,193
Operating Earnings, Excluding Indirect Operating Expenses	35,234	34,512
Reconciliation from Segment Totals to Consolidated [Abstract]
Indirect Operating Expenses	(15,048)	(16,222)
Amortization	(813)	(879)
Operating income	19,373	17,411
Other (Expense) Income, net	(473)	346
Interest Expense	(525)	(744)
Interest Income	453	169
Income Before Taxes and Equity in Net Income of Associated Companies	18,828	17,182
North America [Member]
Segment Reporting Information [Line Items]
Net Sales	76,716	74,758
Operating Earnings, Excluding Indirect Operating Expenses	15,711	15,039
North America [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	1,950	2,106
EMEA [Member]
Segment Reporting Information [Line Items]
Net Sales	49,189	46,707
Operating Earnings, Excluding Indirect Operating Expenses	8,096	6,970
EMEA [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	5,326	5,005
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales	41,937	37,988
Operating Earnings, Excluding Indirect Operating Expenses	9,918	9,628
Asia Pacific [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	107	58
South America [Member]
Segment Reporting Information [Line Items]
Net Sales	13,832	16,740
Operating Earnings, Excluding Indirect Operating Expenses	1,509	2,875
South America [Member] | Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 0	$ 0