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Stock-Based Compensation - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Cash received from stock option exercises | $ 3,300,000 | $ 10,700,000 | $ 5,100,000 |
Cash used for shares withheld to satisfy employee tax obligations for RSUs and PRSUs converted | $ 7,700,000 | 6,200,000 | $ 5,900,000 |
Shares authorized for future grant under stock plan (in shares) | 4,000,000.0 |  |  |
Non-qualified stock options |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Options vesting period | 3 years |  |  |
Options expiration period | 10 years |  |  |
Period of historical option activity considered to determine expected option life |  |  | 10 years |
Unrecognized compensation cost | $ 3,800,000 | $ 1,500,000 |  |
Non-qualified stock options | Minimum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 1 year |  |  |
Non-qualified stock options | Maximum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 3 years |  |  |
RSUs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of shares outstanding | 543,391 | 400,000 | 500,000 | 500,000
Unrecognized compensation cost | $ 8,800,000 |  |  |
RSUs | Minimum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 1 year |  |  |
RSUs | Maximum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 3 years |  |  |
PRSUs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of shares outstanding | 294,941 | 300,000 | 300,000 | 400,000
Unrecognized compensation cost | $ 1,700,000 |  |  |
Performance period | 3 years | 3 years | 3 years |
Shares authorized for issuance under stock plan | 3,300,000 |  |  |
PRSUs | Minimum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 1 year |  |  |
Performance period | 3 years |  |  |
PRSUs | Maximum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Period over which unrecognized compensation costs will be recognized | 3 years |  |  |
Employee stock purchase plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Maximum contribution by eligible employees as percentage of base earnings (as a percent) | 10.00% |  |  |
Maximum contribution by eligible employees in a calendar year | $ 25,000 |  |  |
Common stock purchase price as percentage of fair market value (as a percent) | 85.00% |  |  |
Shares purchased under employee stock purchase plan (in shares) | 35,000 | 48,236 |  |

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- Definition Represents the maximum allowable contribution by eligible employees as a percentage of base earnings. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award maximum employee contribution in calendar year. + References No definition available. + Details
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- Definition Represents the common stock purchase price as a percentage of fair market value. + References No definition available. + Details
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- Definition The period of time, from the grant date until the time at which the share-based [option] award expires. + References No definition available. + 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 Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + 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 The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 (c)(2)(i)-(ii) -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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