Business Segments (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting Measurement Disclosures [Abstract]

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

		Three Months Ended
		March 31,
		2018		2017
Net sales
	North America	$	91,820	$	87,341
	EMEA		62,055		53,927
	Asia/Pacific		48,777		45,150
	South America		9,403		8,491
Total net sales		$	212,055	$	194,909
Operating earnings, excluding indirect operating expenses
	North America	$	20,365	$	20,637
	EMEA		10,293		9,246
	Asia/Pacific		12,142		10,243
	South America		635		797
Total operating earnings, excluding indirect operating expenses			43,435		40,923
Combination-related expenses			(5,209)		(9,075)
Indirect operating expenses			(16,142)		(16,317)
Amortization expense			(1,853)		(1,773)
Consolidated operating income			20,231		13,758
Other expense, net			(369)		(105)
Interest expense			(1,692)		(656)
Interest income			489		523
Consolidated income before taxes and equity in net (loss) income of associated companies		$	18,659	$	13,520