Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 196,349	$ 157,947	$ 365,497	$ 315,502
Income (loss) from operations	(292)	12,642	3,401	26,494
Interest expense	(15,988)	(12,338)	(27,984)	(27,177)
Other	(14,825)	(40,025)	(14,512)	(39,215)
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(31,105)	(39,721)	(39,095)	(39,898)
Total assets	1,761,084		1,761,084		$ 1,475,003
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Total assets	446,111		446,111		428,321
Power Solutions [Member]
Segment Reporting Information [Line Items]
Total assets	390,656		390,656		383,063
Life Sciences [Member]
Segment Reporting Information [Line Items]
Total assets	811,299		811,299		355,703
Corporate and Consolidations [Member]
Segment Reporting Information [Line Items]
Total assets	113,018		113,018		$ 307,916
Operating Segments [Member] | Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	88,079	86,658	177,873	173,104
Income (loss) from operations	7,380	10,688	17,165	21,289
Operating Segments [Member] | Power Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	49,820	48,734	98,502	97,158
Income (loss) from operations	6,000	6,819	11,233	13,614
Operating Segments [Member] | Life Sciences [Member]
Segment Reporting Information [Line Items]
Net sales	59,153	23,114	90,353	46,243
Income (loss) from operations	2,041	3,798	6,245	7,420
Corporate and Eliminations [Member] | Corporate and Consolidations [Member]
Segment Reporting Information [Line Items]
Net sales	(703)	(559)	(1,231)	(1,003)
Income (loss) from operations	$ (15,713)	$ (8,663)	$ (31,242)	$ (15,829)