Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price assumption for maximum bonus pool eligibility (in dollars per share)	$ 24.02
Unrecognized compensation cost related to unvested share-based payments	$ 44.8
Unrecognized compensation cost, amortization period (in years)	2 years
One-Time Retention Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period	4 years
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant	2.7
Existing and Newly Elected Board Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
2020 PSU Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	2 years
2020 PSU Plan \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period	3 years
2020 PSU Plan \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Award performance period	1 year
Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		2 years
Award performance period		3 years
Award vesting percentage after performance period		50.00%
Award vesting percentage		50.00%
Awards holding period (in years)		2 years

Share-Based Compensation Arrangement By Share-Based Payment Award, Holding Period

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- Definition

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

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Fair Value Assumptions, Stock Price Assuming Maximum Bonus Pool Eligibility

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Vesting Percentage After Initial Performance Period

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No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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- 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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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

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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-Topic 718
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- Definition

Percentage of vesting of award under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
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