Business Segments (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting Measurement Disclosures [Abstract]

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

		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
Net sales
	North America	$	82,512	$	76,751	$	159,228	$	151,509
	EMEA		50,228		49,155		99,417		95,862
	Asia/Pacific		45,123		42,542		87,060		80,530
	South America		13,423		16,398		27,255		33,138
Total net sales		$	191,286	$	184,846	$	372,960	$	361,039
Operating earnings, excluding indirect operating expenses
	North America	$	17,868	$	15,996	$	33,579	$	31,035
	EMEA		8,109		8,581		16,205		15,551
	Asia/Pacific		10,221		10,770		20,139		20,398
	South America		889		2,357		2,398		5,232
Total operating earnings, excluding indirect operating expenses			37,087		37,704		72,321		72,216
Indirect operating expenses			(15,327)		(17,027)		(30,375)		(33,249)
Amortization expense			(815)		(884)		(1,628)		(1,763)
Consolidated operating income			20,945		19,793		40,318		37,204
Other income (expense), net			117		2,301		(356)		2,647
Interest expense			(581)		(762)		(1,106)		(1,506)
Interest income			895		229		1,348		398
Consolidated income before taxes and equity in net income of associated companies		$	21,376	$	21,561	$	40,204	$	38,743