SEGMENTS, Entity Wide Information (Details) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)		Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	[3]	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($) Customer		Dec. 31, 2014 USD ($) Customer
Segment Reporting Information [Line Items]
Net sales to external customers											$ 500,153	$ 567,080	[1]	$ 487,076	[1]
Long-Lived Assets	$ 75,109				$ 85,135	[2]					75,109	85,135	[2]
Net sales to external customers	118,539	$ 128,809	$ 131,622	$ 121,182	135,246		$ 144,161	$ 145,658	$ 142,015		$ 500,153	$ 567,080	[1]	$ 487,076	[1]
Net Sales [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Number of customers representing sales in excess of ten percent | Customer											1	1		1
Net sales to external customers											$ 59,800	$ 74,800		$ 76,400
Concentration risk percentage											12.00%	13.20%		15.70%
Power Solutions and Protection [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											$ 172,176	$ 214,766		$ 159,867
Connectivity Solutions [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											168,845	181,697		152,954
Magnetic Solutions [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											159,132	170,617		174,255
United States [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											256,760	304,328		217,258
Long-Lived Assets	29,740				32,327	[2]					29,740	32,327	[2]
Macao [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											163,971	182,248		195,469
People's Republic of China (PRC) [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	32,666				37,796	[2]					32,666	37,796	[2]
United Kingdom [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											21,953	27,552		22,852
Long-Lived Assets	1,419				2,016	[2]					1,419	2,016	[2]
Slovakia [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											17,622	2,807		1,353
Long-Lived Assets	6,574				7,758	[2]					6,574	7,758	[2]
Germany [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											14,104	16,314		18,663
Switzerland [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											14,048	18,050		15,236
Long-Lived Assets	3,593				4,006	[2]					$ 3,593	4,006	[2]
Asia [Member] | Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage											40.00%
All Other Foreign Countries [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											$ 11,695	15,781		16,245
Long-Lived Assets	$ 1,117				$ 1,232	[2]					1,117	1,232	[2]
Reportable Operating Segments [Member] | North America [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											256,760	304,328	[1]	217,258	[1]
Net sales to external customers											268,935	329,304	[1]	248,007	[1]
Reportable Operating Segments [Member] | Asia [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											168,458	188,146	[1]	201,338	[1]
Net sales to external customers											256,202	295,751	[1]	275,765	[1]
Reportable Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Net sales to external customers											74,935	74,606	[1]	68,480	[1]
Net sales to external customers											$ 86,750	$ 148,735	[1]	$ 114,748	[1]

[1] (Revised)

[2] Revised

[3] Revised from 10-Q disclosures to reflect immaterial measurement period adjustments related to the 2014 Acquisitions. First quarter 10-Q reflected gross profit of $27.1 million, net earnings of $5.6 million, earnings per Class A common share of $0.45 per share and earnings per Class B common share of $0.48 per share.