Stock and Incentive Programs for Employees and Directors - Schedule of Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Shares Under Option
Outstanding at beginning of period	420
Cancelled/forfeited/expired	(144)
Outstanding at end of period	276	420
Vested and exercisable at end of period	276
Weighted Average Exercise Price
Outstanding at beginning of period	$ 26.38
Cancelled/forfeited/expired	31.76
Outstanding at end of period	23.59	$ 26.38
Vested and exercisable at end of period	$ 23.59
Weighted Average Remaining Contractual Term (years)
Outstanding	10 months 24 days	1 year 4 months 24 days
Vested and exercisable at end of period	10 months 24 days

Weighted average remaining contractual term.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average price of options that were either forfeited or expired.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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