Increase (decrease) in allocated share based compensation expense.

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- Definition

Share-based compensation arrangement by share-based payment award, equity instruments other than options, expected to vest.

+ References

No definition available.

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- Definition

Share based Compensation Arrangement by Share based Payment Award, Maximum Contribution Per Employee

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Vesting Percentage Multiplier

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Weighting Of Performance Metric, Earnings Per Share Performance Goal

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Weighting Of Performance Metric, Return On Invested Capital

+ References

No definition available.

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- Definition

Share reserve to restricted stock units granted ratio.

+ References

No definition available.

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- Definition

Term of offering period, employee stock purchase plan.

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

+ References

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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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- Definition

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).

+ References

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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.

+ References

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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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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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STOCK BASED COMPENSATION - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($) installment shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)	3,016,597
Weighting of performance metric, earnings per share performance goals	0.50
Weighting of performance metric, return on invested capital	0.50
Granted (in shares)	0	340,652	430,337
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,799,999
Percentage of market price	85.00%
Term of offering period	6 months
Maximum payroll deductions during the offering period, per employee \| $	$ 5,000
Stock issued during period (in shares)	70,120	97,669	131,959
Shares available for issuance (in shares)	587,705
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage multiplier	0.75
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage multiplier	1.25
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expenses related to stock options \| $	$ 3,600,000
Weighted average period of recognition for unrecognized compensation expenses	1 year 7 months 6 days
Stock Options \| Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Stock Options \| Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of an option granted under any plan	8 years
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term of an option granted under any plan	10 years
Stock Option Plans and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction to stock-based compensation expense \| $	$ (4,900,000)	$ (6,700,000)	$ (3,500,000)
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition for unrecognized compensation expenses	1 year 10 months 24 days
Award granted	574,712
Unrecognized compensation expenses related to RSUs \| $	$ 19,300,000
Fair value of units vested (in shares) \| $	$ 18,200,000	$ 5,300,000	$ 4,200,000
Restricted Stock Units (RSUs) \| 2008, 2011, and 2014 Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of share reserve related to RSUs granted	200.00%
Restricted Stock Units (RSUs) \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of share reserve related to RSUs granted	100.00%
Restricted Stock Units (RSUs) \| 2008, 2011 and 2014 Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award granted	0
Restricted Stock Units (RSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Restricted Stock Units (RSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Award granted	109,006
Number of installments (in installments) \| installment	3
Additional shares expected to vest	224,000
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of installments (in installments) \| installment	4