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Stock-Based Compensation - Schedule of Information Related to Intrinsic Value (Detail) - Omnibus Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
SARs exercised and RSUs and PSUs vested	$ 86,843	$ 97,302	$ 100,264
SARs outstanding	45,197	21,563	112,604
SARs vested and expected to vest	45,162	21,547	111,284
SARs exercisable	$ 41,432	$ 19,745	$ 78,865

X

- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options and stock appreciation rights outstanding under the plan as of the balance sheet date.

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No definition available.

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- Definition

As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options and stock appreciation rights outstanding.

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No definition available.

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- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options and stock appreciation rights outstanding and currently exercisable under the option plan or stock appreciation rights plan as of the balance sheet date.

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No definition available.

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- Definition

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

Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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No definition available.

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