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.