Number of active stock based plans.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
-Paragraph 2
-Subparagraph (a)
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- Definition

Amount of additional cost recognized for award under share-based payment arrangement from occurrence of event accelerating recognition of cost.

+ References

No definition available.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
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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.

+ References

No definition available.

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Stock-based Compensation Plans - Additional Information (Detail) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) Plans	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Active equity-based stock plans \| Plans										2
Income tax benefit	$ (498,859)	$ (47,219)	$ 40,099	$ 5,688	$ (68,784)	$ 24,137	$ (28,518)	$ 42,676		$ (500,291)	$ (30,489)	$ (251,026)
Equity Compensation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefit										$ 3,400	$ 3,600	5,300
Officers
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accelerated vesting of equity grants									$ 30,800			$ 30,800
Vesting period										1 year