Acquisition of C Technologies, Inc. (Consideration Transferred) (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Cash consideration	$ 182,176
Equity consideration	53,938
Spectrum Inc.
Business Acquisition [Line Items]
Cash consideration	185,971
Equity consideration	53,938
Fair value of net assets acquired	$ 239,909

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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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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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