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Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 221,666	$ 196,349	$ 434,922	$ 365,497
Income (loss) from operations	8,098	(292)	8,699	3,401
Interest expense	(13,958)	(15,988)	(27,759)	(27,984)
Other	(57)	(14,825)	(3,485)	(14,512)
Loss before (provision) benefit for income taxes and share of net income from joint venture	(5,917)	(31,105)	(22,545)	(39,095)
Total assets	1,572,285		1,572,285		$ 1,501,570
Mobile Solutions
Segment Reporting Information [Line Items]
Total assets	396,398		396,398		356,387
Power Solutions
Segment Reporting Information [Line Items]
Total assets	309,516		309,516		297,947
Life Sciences
Segment Reporting Information [Line Items]
Total assets	815,626		815,626		802,770
Corporate and Consolidations
Segment Reporting Information [Line Items]
Total assets	50,745		50,745		$ 44,466
Operating Segments | Mobile Solutions
Segment Reporting Information [Line Items]
Net sales	79,444	88,079	157,519	177,873
Income (loss) from operations	4,092	7,380	8,199	17,165
Operating Segments | Power Solutions
Segment Reporting Information [Line Items]
Net sales	51,393	49,820	101,050	98,502
Income (loss) from operations	5,682	6,000	9,506	11,233
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Net sales	91,332	59,153	177,340	90,353
Income (loss) from operations	9,305	2,041	13,151	6,245
Corporate and Eliminations | Corporate and Consolidations
Segment Reporting Information [Line Items]
Net sales	(503)	(703)	(987)	(1,231)
Income (loss) from operations	$ (10,981)	$ (15,713)	$ (22,157)	$ (31,242)

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