Business Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting Measurement Disclosures [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Net sales
	North America	$	86,126	$	90,010	$	251,586	$	258,977
	EMEA		49,825		45,989		150,582		130,345
	Asia/Pacific		45,892		46,067		130,555		138,913
	South America		8,585		7,158		22,697		26,045
Total net sales		$	190,428	$	189,224	$	555,420	$	554,280
Operating earnings, excluding indirect operating expenses
	North America	$	20,324	$	21,893	$	59,078	$	59,938
	EMEA		8,295		7,106		25,251		20,538
	Asia/Pacific		11,737		11,250		33,865		33,874
	South America		680		261		703		2,270
Total operating earnings, excluding indirect operating expenses			41,036		40,510		118,897		116,620
Indirect operating expenses			(17,967)		(20,031)		(50,912)		(53,585)
Amortization expense			(1,730)		(1,751)		(5,319)		(4,998)
Consolidated operating income			21,339		18,728		62,666		58,037
Other income (expense), net			514		185		1,491		(97)
Interest expense			(758)		(697)		(2,226)		(1,891)
Interest income			551		422		1,444		1,117
Consolidated income before taxes and equity in net income of
	associated companies	$	21,646	$	18,638	$	63,375	$	57,166