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Summary of Unaudited Pro Forma Combined Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Marnell Gaming,LLC [Member] |  |
Business Acquisition [Line Items] |  |
Pro forma combined revenues | $ 951,802 |
Pro forma combined net income (loss) | $ (16,432) |
Weighted-average common shares outstanding: |  |
Basic | 28,464 |
Diluted | 28,464 |
Pro forma combined net income (loss) per share: |  |
Basic | $ (0.58) |
Diluted | $ (0.58) |
American Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Pro forma combined revenues |  | $ 843,589
Pro forma combined net income (loss) |  | $ 23,131
Weighted-average common shares outstanding: |  |
Basic |  | 26,342
Diluted |  | 27,897
Pro forma combined net income (loss) per share: |  |
Basic |  | $ 0.88
Diluted |  | $ 0.83

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