Business Segments (Tables)

9 Months Ended

Sep. 30, 2015

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,
		2015		2014		2015		2014
Net sales
	North America	$	90,010	$	87,909	$	258,977	$	247,137
	EMEA		45,989		49,352		130,345		148,769
	Asia/Pacific		46,067		49,601		138,913		136,661
	South America		7,158		12,005		26,045		39,260
Total net sales		$	189,224	$	198,867	$	554,280	$	571,827
Operating earnings, excluding indirect operating expenses
	North America	$	21,893	$	17,771	$	59,938	$	51,350
	EMEA		7,106		8,589		20,538		24,794
	Asia/Pacific		11,250		11,925		33,874		32,064
	South America		261		883		2,270		3,281
Total operating earnings, excluding indirect operating expenses			40,510		39,168		116,620		111,489
Indirect operating expenses			(20,031)		(17,489)		(53,585)		(47,864)
Amortization expense			(1,751)		(1,126)		(4,998)		(2,754)
Consolidated operating income			18,728		20,553		58,037		60,871
Other income (expense), net			185		914		(97)		558
Interest expense			(697)		(641)		(1,891)		(1,747)
Interest income			422		642		1,117		1,990
Consolidated income before taxes and equity in net income of
	associated companies	$	18,638	$	21,468	$	57,166	$	61,672