REVENUE, Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 140,710	$ 131,617	$ 258,961	$ 245,285
Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	99,447		184,464
Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	41,263		74,497
Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	48,928		91,846
Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	45,548		83,776
Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	46,234		83,339
North America [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	71,240	64,905	130,696	125,335
North America [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	44,055		81,951
North America [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	27,185		48,745
North America [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	34,834		65,878
North America [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	10,158		18,209
North America [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	26,248		46,609
Asia [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	45,914	46,071	84,535	81,883
Asia [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	39,402		72,330
Asia [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	6,512		12,205
Asia [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	4,820		8,241
Asia [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	32,844		60,669
Asia [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	8,250		15,625
Europe [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	23,556	$ 20,641	43,730	$ 38,067
Europe [Member] | Direct to Customer [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	15,990		30,183
Europe [Member] | Through Distribution [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	7,566		13,547
Europe [Member] | Connectivity Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	9,274		17,727
Europe [Member] | Magnetic Solutions [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	2,546		4,898
Europe [Member] | Power Solutions and Protection [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 11,736		$ 21,105