Acquisitions - Purchase Price at the Date of Acquisition (Detail) - Redstone Aerospace Corporation $ in Thousands	1 Months Ended
Mar. 31, 2019 USD ($)
Business Acquisition [Line Items]
Net cash paid at acquisition	$ 27,959
Fair value of cash earn out arrangement	1,776
Purchase price	$ 29,735

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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