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Shareholders’ Equity and Stock Incentive Plans - Additional Information (Details) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 22, 2020 | Jan. 01, 2020 | Aug. 27, 2015 | Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Aug. 03, 2021 | Mar. 12, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock repurchase, authorized |  |  |  |  |  |  |  | $ 50,000,000 | $ 25,000,000
Shares repurchased (in shares) |  |  |  | 226,485 |  |  |  |  |
Common stock price per share (USD per share) |  |  |  | $ 46.87 | $ 46.87 |  |  |  |
Repurchases of common stock |  |  |  |  | $ 10,616,000 | $ 950,000 |  |  |
Remaining authorized repurchase amount |  |  |  | $ 39,400,000 | 39,400,000 |  |  |  |
Proceeds from exercise of stock options |  |  |  |  | 98,000 | 0 | $ 0 |  |
Lyle A. Berman |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | 50,000 |  |  |  |  |  |  |  |
Common stock price per share (USD per share) | $ 19.00 |  |  |  |  |  |  |  |
Accumulated Deficit |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Repurchases of common stock |  |  |  | 10,600,000 | 10,613,000 | 950,000 |  |  |
Accumulated Deficit | Lyle A. Berman |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Repurchases of common stock | $ 1,000,000 |  |  |  |  |  |  |  |
Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Intrinsic value of stock options exercised |  |  |  |  | $ 26,100,000 | $ 1,300,000 | $ 1,600,000 |  |
Dividend rate variable |  |  |  |  | 0.00% |  |  |  |
Stock options, unrecognized share-based compensation expense |  |  |  | 0 | $ 0 |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock options, unrecognized share-based compensation expense |  |  |  | 9,200,000 | $ 9,200,000 |  |  |  |
Weighted-average period for recognition |  |  |  |  | 1 year 10 months 24 days |  |  |  |
Performance Stock Units (PSUs) |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock options, unrecognized share-based compensation expense |  |  |  | $ 8,200,000 | $ 8,200,000 |  |  |  |
Weighted-average period for recognition |  |  |  |  | 1 year 10 months 24 days |  |  |  |
Performance Stock Units (PSUs) | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Service period |  |  |  |  | 1 year |  |  |  |
Vesting period |  |  |  |  | 2 years |  |  |  |
Performance Stock Units (PSUs) | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Service period |  |  |  |  | 2 years |  |  |  |
Vesting period |  |  |  |  | 1 year |  |  |  |
2015 Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Expiration term |  |  |  |  | 10 years |  |  |  |
Number of shares authorized (in shares) |  |  | 2,250,000 |  |  |  |  |  |
Number of shares annual increase (in shares) |  | 1,126,361 | 1,800,000 |  |  |  |  |  |
Plan shares annual increase, percentage |  |  | 4.00% |  |  |  |  |  |
Maximum number of shares authorized per one participant (in shares) |  |  | 2,000,000 | 2,199,632 | 2,199,632 |  |  |  |

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- Definition Amount of cash inflow from exercise of option 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 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + 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 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. + 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)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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