General - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Finite Lived Intangible Assets [Line Items]
Provision for asset impairment		$ 97,631	$ 0
Foundations
Finite Lived Intangible Assets [Line Items]
Provision for asset impairment	$ 97,600	97,600
Impairment provision for tradename intangible asset	74,900	74,900
Impairment charges for real property assets	$ 22,700	$ 22,700

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

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