Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue, Major Customer [Line Items]
Net sales	$ 126,804	$ 116,213
Automotive
Revenue, Major Customer [Line Items]
Net sales	63,604	61,438
General Industrial
Revenue, Major Customer [Line Items]
Net sales	38,020	30,522
Electrical
Revenue, Major Customer [Line Items]
Net sales	15,182	13,861
Other
Revenue, Major Customer [Line Items]
Net sales	9,998	10,392
United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	77,197	75,354
China
Revenue, Major Customer [Line Items]
Net sales	15,920	8,849
Brazil
Revenue, Major Customer [Line Items]
Net sales	9,860	8,713
Mexico
Revenue, Major Customer [Line Items]
Net sales	8,412	6,979
Germany
Revenue, Major Customer [Line Items]
Net sales	1,931	2,189
Poland
Revenue, Major Customer [Line Items]
Net sales	1,184	1,763
Other
Revenue, Major Customer [Line Items]
Net sales	12,300	12,366
Operating Segments | Mobile Solutions
Revenue, Major Customer [Line Items]
Net sales	77,776	69,884
Operating Segments | Mobile Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	50,144	49,074
Operating Segments | Mobile Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	24,310	17,979
Operating Segments | Mobile Solutions | Electrical
Revenue, Major Customer [Line Items]
Net sales	0	0
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	3,322	2,831
Operating Segments | Mobile Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	37,438	37,129
Operating Segments | Mobile Solutions | China
Revenue, Major Customer [Line Items]
Net sales	14,414	7,692
Operating Segments | Mobile Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	9,668	8,583
Operating Segments | Mobile Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	5,015	4,836
Operating Segments | Mobile Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	1,767	2,150
Operating Segments | Mobile Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	1,180	1,758
Operating Segments | Mobile Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	8,294	7,736
Operating Segments | Power Solutions
Revenue, Major Customer [Line Items]
Net sales	49,075	46,401
Operating Segments | Power Solutions | Automotive
Revenue, Major Customer [Line Items]
Net sales	13,460	12,364
Operating Segments | Power Solutions | General Industrial
Revenue, Major Customer [Line Items]
Net sales	13,710	12,543
Operating Segments | Power Solutions | Electrical
Revenue, Major Customer [Line Items]
Net sales	15,182	13,861
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	6,723	7,633
Operating Segments | Power Solutions | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	39,806	38,297
Operating Segments | Power Solutions | China
Revenue, Major Customer [Line Items]
Net sales	1,506	1,157
Operating Segments | Power Solutions | Brazil
Revenue, Major Customer [Line Items]
Net sales	192	130
Operating Segments | Power Solutions | Mexico
Revenue, Major Customer [Line Items]
Net sales	3,397	2,143
Operating Segments | Power Solutions | Germany
Revenue, Major Customer [Line Items]
Net sales	164	39
Operating Segments | Power Solutions | Poland
Revenue, Major Customer [Line Items]
Net sales	4	5
Operating Segments | Power Solutions | Other
Revenue, Major Customer [Line Items]
Net sales	4,006	4,630
Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(47)	(72)
Intersegment Sales Eliminations | Automotive
Revenue, Major Customer [Line Items]
Net sales
Intersegment Sales Eliminations | General Industrial
Revenue, Major Customer [Line Items]
Net sales
Intersegment Sales Eliminations | Electrical
Revenue, Major Customer [Line Items]
Net sales
Intersegment Sales Eliminations | Other
Revenue, Major Customer [Line Items]
Net sales	(47)	(72)
Intersegment Sales Eliminations | United States and Puerto Rico
Revenue, Major Customer [Line Items]
Net sales	(47)	(72)
Intersegment Sales Eliminations | China
Revenue, Major Customer [Line Items]
Net sales	0	0
Intersegment Sales Eliminations | Brazil
Revenue, Major Customer [Line Items]
Net sales	0	0
Intersegment Sales Eliminations | Mexico
Revenue, Major Customer [Line Items]
Net sales	0	0
Intersegment Sales Eliminations | Germany
Revenue, Major Customer [Line Items]
Net sales	0	0
Intersegment Sales Eliminations | Poland
Revenue, Major Customer [Line Items]
Net sales	0	0
Intersegment Sales Eliminations | Other
Revenue, Major Customer [Line Items]
Net sales	$ 0	$ 0