Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Major Customer [Line Items]
Net sales	$ 196,349	$ 157,947	$ 365,497	$ 315,502
Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	(703)		(1,231)
United States [Member]
Revenue, Major Customer [Line Items]
Net sales	137,804		257,612
United States [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	(703)		(1,231)
Chinese [Member]
Revenue, Major Customer [Line Items]
Net sales	13,852		27,044
Chinese [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Mexico [Member]
Revenue, Major Customer [Line Items]
Net sales	10,751		21,356
Mexico [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Brazilian [Member]
Revenue, Major Customer [Line Items]
Net sales	9,666		19,601
Brazilian [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Poland [Member]
Revenue, Major Customer [Line Items]
Net sales	1,924		3,990
Poland [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Czech Republic [Member]
Revenue, Major Customer [Line Items]
Net sales	1,561		3,371
Czech Republic [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Italy [Member]
Revenue, Major Customer [Line Items]
Net sales	1,710		3,385
Italy [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Germany [Member]
Revenue, Major Customer [Line Items]
Net sales	5,367		6,909
Germany [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Switzerland [Member]
Revenue, Major Customer [Line Items]
Net sales	3,043		4,449
Switzerland [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Netherlands [Member]
Revenue, Major Customer [Line Items]
Net sales	933		1,907
Netherlands [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Other Country [Member]
Revenue, Major Customer [Line Items]
Net sales	9,738		15,873
Other Country [Member] | Intersegment Sales Eliminations [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Mobile Solutions [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	88,079	86,658	177,873	173,104
Mobile Solutions [Member] | United States [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	48,142		97,797
Mobile Solutions [Member] | Chinese [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	11,581		23,162
Mobile Solutions [Member] | Mexico [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	7,236		14,472
Mobile Solutions [Member] | Brazilian [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	9,637		19,522
Mobile Solutions [Member] | Poland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,919		3,971
Mobile Solutions [Member] | Czech Republic [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,561		3,371
Mobile Solutions [Member] | Italy [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,562		3,139
Mobile Solutions [Member] | Germany [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,551		3,085
Mobile Solutions [Member] | Switzerland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,294		2,700
Mobile Solutions [Member] | Netherlands [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Mobile Solutions [Member] | Other Country [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	3,596		6,654
Power Solutions [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	49,820	48,734	98,502	97,158
Power Solutions [Member] | United States [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	41,924		82,052
Power Solutions [Member] | Chinese [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	959		2,444
Power Solutions [Member] | Mexico [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	3,348		6,545
Power Solutions [Member] | Brazilian [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		50
Power Solutions [Member] | Poland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	4		18
Power Solutions [Member] | Czech Republic [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Power Solutions [Member] | Italy [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	11		109
Power Solutions [Member] | Germany [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		7
Power Solutions [Member] | Switzerland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	29		29
Power Solutions [Member] | Netherlands [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	933		1,907
Power Solutions [Member] | Other Country [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	2,612		5,341
Life Sciences [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	59,153	$ 23,114	90,353	$ 46,243
Life Sciences [Member] | United States [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	48,441		78,994
Life Sciences [Member] | Chinese [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,312		1,438
Life Sciences [Member] | Mexico [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	167		339
Life Sciences [Member] | Brazilian [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	29		29
Life Sciences [Member] | Poland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1		1
Life Sciences [Member] | Czech Republic [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Life Sciences [Member] | Italy [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	137		137
Life Sciences [Member] | Germany [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	3,816		3,817
Life Sciences [Member] | Switzerland [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	1,720		1,720
Life Sciences [Member] | Netherlands [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	0		0
Life Sciences [Member] | Other Country [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Net sales	$ 3,530		$ 3,878