Goodwill - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 439,452,000	$ 439,095,000	$ 439,452,000	$ 454,612,000
Goodwill impairment		0	182,542,000	0
Intangible assets, net	376,248,000	329,260,000	376,248,000	237,702,000
Paragon Medical
Goodwill [Line Items]
Goodwill	161,800,000		161,800,000
Other
Goodwill [Line Items]
Goodwill	8,000,000		8,000,000
Southern California Technical Arts, Inc.
Goodwill [Line Items]
Goodwill	2,800,000		2,800,000
Life Sciences
Goodwill [Line Items]
Goodwill	344,947,000	344,316,000	344,947,000	177,784,000
Goodwill impairment		0	0
Intangible assets, net	244,365,000	211,847,000	244,365,000	93,226,000
Mobile Solutions
Goodwill [Line Items]
Goodwill	0	0	0	74,147,000
Goodwill impairment			73,442,000
Intangible assets, net	35,892,000	32,416,000	35,892,000	39,446,000
Power Solutions
Goodwill [Line Items]
Goodwill	94,505,000	94,779,000	94,505,000	202,681,000
Goodwill impairment	109,100,000		109,100,000
Intangible assets, net	$ 95,991,000	84,997,000	$ 95,991,000	$ 105,030,000
Reduction in goodwill		$ 1,600,000