Business Segments (Tables)

9 Months Ended

Sep. 30, 2018

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,
		2018		2017		2018		2017
Net sales
	North America	$	101,706	$	90,450	$	290,918	$	268,122
	EMEA		55,498		58,775		177,719		167,209
	Asia/Pacific		55,757		54,200		159,882		147,074
	South America		9,061		9,493		27,520		26,605
Total net sales		$	222,022	$	212,918	$	656,039	$	609,010
Operating earnings, excluding indirect operating expenses
	North America	$	24,558	$	18,888	$	68,160	$	59,146
	EMEA		8,577		8,862		27,966		26,325
	Asia/Pacific		14,761		13,963		41,524		36,018
	South America		1,214		965		2,963		2,826
Total operating earnings, excluding indirect operating expenses			49,110		42,678		140,613		124,315
Combination-related expenses			(2,904)		(9,675)		(12,404)		(23,088)
Indirect operating expenses			(19,460)		(17,108)		(54,971)		(50,067)
Amortization expense			(1,827)		(1,886)		(5,525)		(5,490)
Consolidated operating income			24,919		14,009		67,713		45,670
Other (expense) income, net			(523)		249		(631)		(1,427)
Interest expense			(1,510)		(793)		(4,804)		(2,229)
Interest income			521		762		1,581		1,825
Consolidated income before taxes and equity in net income of
	associated companies	$	23,407	$	14,227	$	63,859	$	43,839