Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue, Major Customer [Line Items]
Net sales	$ 123,157	$ 78,532	$ 249,961	$ 194,745
Automotive
Revenue, Major Customer [Line Items]
Net sales	58,368	29,328	121,972	90,766
General Industrial
Revenue, Major Customer [Line Items]
Net sales	38,074	28,523	76,094	59,045
Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	16,798	12,838	31,980	26,699
Other
Revenue, Major Customer [Line Items]
Net sales	9,917	7,843	19,915	18,235
United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	74,708	51,100	151,905	126,454
China
Revenue, Major Customer [Line Items]
Net sales	14,501	11,978	30,421	20,827
Brazil
Revenue, Major Customer [Line Items]
Net sales	10,328	2,195	20,188	10,908
Mexico
Revenue, Major Customer [Line Items]
Net sales	9,178	6,575	17,590	13,554
Germany
Revenue, Major Customer [Line Items]
Net sales	1,465	941	3,396	3,130
Poland
Revenue, Major Customer [Line Items]
Net sales	907	344	2,091	2,107
Other
Revenue, Major Customer [Line Items]
Net sales	12,070	5,399	24,370	17,765
Operating Segments | Mobile Solutions
Revenue, Major Customer [Line Items]
Net sales	73,886	41,037	151,662	110,921
Operating Segments | Mobile Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	46,247	22,511	96,391	71,585
Operating Segments | Mobile Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	24,449	17,178	48,759	35,157
Operating Segments | Mobile Solutions | Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	3,190	1,348	6,512	4,179
Operating Segments | Mobile Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	35,284	20,237	72,722	57,366
Operating Segments | Mobile Solutions | China
Revenue, Major Customer [Line Items]
Net sales	13,219	10,726	27,633	18,418
Operating Segments | Mobile Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	9,985	2,132	19,653	10,715
Operating Segments | Mobile Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	4,829	2,456	9,844	7,292
Operating Segments | Mobile Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	1,369	851	3,136	3,001
Operating Segments | Mobile Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	904	341	2,084	2,099
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	8,296	4,294	16,590	12,030
Operating Segments | Power Solutions
Revenue, Major Customer [Line Items]
Net sales	49,271	37,491	98,346	83,892
Operating Segments | Power Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	12,121	6,817	25,581	19,181
Operating Segments | Power Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	13,625	11,345	27,335	23,888
Operating Segments | Power Solutions | Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	16,798	12,838	31,980	26,699
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	6,727	6,491	13,450	14,124
Operating Segments | Power Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	39,424	30,859	79,230	69,156
Operating Segments | Power Solutions | China
Revenue, Major Customer [Line Items]
Net sales	1,282	1,252	2,788	2,409
Operating Segments | Power Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	343	63	535	193
Operating Segments | Power Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	4,349	4,119	7,746	6,262
Operating Segments | Power Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	96	90	260	129
Operating Segments | Power Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	3	3	7	8
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	3,774	1,105	7,780	5,735
Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0	4	(47)	(68)
Intersegment Sales Eliminations | Automotive
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | General Industrial
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Residential/Commercial Electrical
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Other
Revenue, Major Customer [Line Items]
Net sales	0	4	(47)	(68)
Intersegment Sales Eliminations | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	0	4	(47)	(68)
Intersegment Sales Eliminations | China
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Brazil
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Mexico
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Germany
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Poland
Revenue, Major Customer [Line Items]
Net sales	0	0	0	0
Intersegment Sales Eliminations | Other
Revenue, Major Customer [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0