Shared-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 886	$ 1,296
Discontinued Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		200
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 548	$ 892
Stock units issued (in shares)	425
Fair value assumptions, exercise price (in dollars per share)	$ 6.79
Total grant-date fair value of restricted stock, vested	$ 2,700
TSR Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units issued (in shares)	142
Award performance period	36 months
Percentage of shares issuable based on threshold performance	50.00%
Percentage of shares issuable based on target performance	100.00%
Percentage of shares issuable based on maximum performance	150.00%
ROIC Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units issued (in shares)	172
Percentage of shares issuable based on target performance	100.00%
Employees \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted vesting period	3 years
Non-executive Directors \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted vesting period	1 year

Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period

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- Definition

Share based compensation arrangement by share based payment award percentage of shares issuable based on threshold performance.

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- Definition

Share based compensation arrangement by share-based payment award percentage of shares issuable based on maximum performance.

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- Definition

Share based compensation arrangement by share-based payment award, percentage of shares Issuable based on target performance.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Publisher FASB
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- Definition

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.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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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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