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Acquisitions (Consideration Transferred) (Detail) - USD ($) $ in Thousands		12 Months Ended
	Aug. 01, 2017	Dec. 31, 2019	Dec. 31, 2017
Business Acquisition [Line Items]
Equity consideration		$ 53,938	$ 247,575
Working capital adjustment			$ 425
C Technologies, Inc.
Business Acquisition [Line Items]
Cash consideration		185,949
Equity consideration		53,938
Fair value of net assets acquired		$ 239,887
Spectrum Inc.
Business Acquisition [Line Items]
Cash consideration	$ 122,932
Equity consideration	247,575
Working capital adjustment	425
Fair value of net assets acquired	$ 370,932

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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