REVENUE, Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Abstract]
Net sales	$ 125,389	$ 118,251
Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Net sales	91,222	85,017
Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Net sales	34,167	33,234
Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	44,361	42,919
Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	38,256	38,228
Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Net sales	42,772	37,104
North America [Member]
Disaggregation of Revenue [Abstract]
Net sales	64,587	59,457
North America [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Net sales	43,881	37,897
North America [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Net sales	20,706	21,560
North America [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	32,121	31,046
North America [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	8,945	8,051
North America [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Net sales	23,521	20,360
Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	37,277	38,620
Asia [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Net sales	31,128	32,927
Asia [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Net sales	6,149	5,693
Asia [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	3,475	3,420
Asia [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	27,090	27,825
Asia [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Net sales	6,712	7,375
Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	23,525	20,174
Europe [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Net sales	16,213	14,193
Europe [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Net sales	7,312	5,981
Europe [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	8,765	8,453
Europe [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	2,221	2,352
Europe [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 12,539	$ 9,369