Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 205,683	$ 148,156	$ 571,180	$ 463,658
Income (loss) from operations	5,881	5,551	9,283	32,045
Interest expense	(18,608)	(12,739)	(46,592)	(39,916)
Other	(6,932)	782	(21,444)	(38,433)
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(19,659)	(6,406)	(58,753)	(46,304)
Total assets	1,763,322		1,763,322		$ 1,475,003
Mobile Solutions
Segment Reporting Information [Line Items]
Total assets	446,830		446,830		428,321
Power Solutions
Segment Reporting Information [Line Items]
Total assets	404,701		404,701		383,063
Life Sciences
Segment Reporting Information [Line Items]
Total assets	806,828		806,828		355,703
Corporate and Consolidations
Segment Reporting Information [Line Items]
Total assets	104,963		104,963		$ 307,916
Operating Segments | Mobile Solutions
Segment Reporting Information [Line Items]
Net sales	81,805	81,664	259,678	254,768
Income (loss) from operations	4,657	6,799	21,822	28,088
Operating Segments | Power Solutions
Segment Reporting Information [Line Items]
Net sales	46,082	44,824	144,584	141,982
Income (loss) from operations	2,706	4,166	13,939	17,780
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Net sales	78,363	22,154	168,716	68,397
Income (loss) from operations	6,717	3,011	12,962	10,431
Corporate and Eliminations | Corporate and Consolidations
Segment Reporting Information [Line Items]
Net sales	(567)	(486)	(1,798)	(1,489)
Income (loss) from operations	$ (8,199)	$ (8,425)	$ (39,440)	$ (24,254)