Revenue from Contracts with Customers - Summary of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Major Customer [Line Items]
Net sales	$ 205,683	$ 148,156	$ 571,180	$ 463,658
Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(567)		(1,798)
United States
Revenue, Major Customer [Line Items]
Net sales	147,780		405,392
United States | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	(567)		(1,798)
Chinese
Revenue, Major Customer [Line Items]
Net sales	15,212		42,256
Chinese | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Mexico
Revenue, Major Customer [Line Items]
Net sales	8,914		30,270
Mexico | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Brazilian
Revenue, Major Customer [Line Items]
Net sales	8,307		27,908
Brazilian | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Germany
Revenue, Major Customer [Line Items]
Net sales	8,753		15,662
Germany | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Switzerland
Revenue, Major Customer [Line Items]
Net sales	1,467		7,777
Switzerland | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Poland
Revenue, Major Customer [Line Items]
Net sales	3,328		5,509
Poland | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Italy
Revenue, Major Customer [Line Items]
Net sales	1,519		4,881
Italy | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Czech Republic
Revenue, Major Customer [Line Items]
Net sales	1,496		4,838
Czech Republic | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Netherlands
Revenue, Major Customer [Line Items]
Net sales	649		2,556
Netherlands | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Other Country
Revenue, Major Customer [Line Items]
Net sales	8,258		24,131
Other Country | Intersegment Sales Eliminations
Revenue, Major Customer [Line Items]
Net sales	0		0
Mobile Solutions | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	81,805	81,664	259,678	254,768
Mobile Solutions | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	46,341		144,138
Mobile Solutions | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	11,111		34,273
Mobile Solutions | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	6,570		21,042
Mobile Solutions | Brazilian | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	8,200		27,722
Mobile Solutions | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,415		4,500
Mobile Solutions | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,420		3,915
Mobile Solutions | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,215		5,485
Mobile Solutions | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,514		4,424
Mobile Solutions | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,285		4,791
Mobile Solutions | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0		0
Mobile Solutions | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,734		9,388
Power Solutions | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	46,082	44,824	144,584	141,982
Power Solutions | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	38,137		120,189
Power Solutions | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	1,696		4,140
Power Solutions | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,254		8,799
Power Solutions | Brazilian | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	107		157
Power Solutions | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	17		24
Power Solutions | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	47		35
Power Solutions | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	6		23
Power Solutions | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	5		214
Power Solutions | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	105		47
Power Solutions | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	649		2,556
Power Solutions | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	3,059		8,400
Life Sciences | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	78,363	$ 22,154	168,716	$ 68,397
Life Sciences | United States | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	63,869		142,863
Life Sciences | Chinese | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,405		3,843
Life Sciences | Mexico | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	90		429
Life Sciences | Brazilian | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0		29
Life Sciences | Germany | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	7,321		11,138
Life Sciences | Switzerland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0		3,827
Life Sciences | Poland | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	2,107		1
Life Sciences | Italy | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0		243
Life Sciences | Czech Republic | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	106		0
Life Sciences | Netherlands | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	0		0
Life Sciences | Other Country | Operating Segments
Revenue, Major Customer [Line Items]
Net sales	$ 2,465		$ 6,343