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Goodwill and Intangible Assets - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 158,396,000 |  | $ 158,396,000 |  | $ 158,396,000
Amortization of intangible assets | 1,900,000 | $ 5,700,000 | 6,100,000 | $ 16,900,000 |
Impairment on long-lived assets |  |  | 0 |  |
Impairment of indefinite-lived intangible assets |  |  | 6,890,000 |  | 6,890,000
Level 3 | Discount Rate | Discounted Cash Flow |  |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Measurement of fair value inputs |  |  |  | 12.00% |
Level 3 | Long-term Revenue Growth Rate | Discounted Cash Flow | Minimum |  |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Measurement of fair value inputs |  |  |  | 2.00% |
Level 3 | Long-term Revenue Growth Rate | Discounted Cash Flow | Maximum |  |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Measurement of fair value inputs |  |  |  | 3.00% |
Casinos |  |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 60,300,000 |  | 60,300,000 |  | 60,300,000
Impairment of goodwill |  |  |  | $ 25,300,000 |
Impairment of indefinite-lived intangible assets |  |  |  | $ 2,600,000 |
Distributed Gaming |  |  |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 98,100,000 |  | $ 98,100,000 |  | $ 98,100,000

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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