Basis of Presentation - Acquisition (Detail) - AIL $ in Millions	Jun. 12, 2020 USD ($)
Business Acquisition [Line Items]
Percentage of capital stock acquired	100.00%
Consideration transferred	$ 55.6

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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