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Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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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

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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 + Details
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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. + 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 + Details
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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. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + Details
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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. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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