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Commitments and Contingencies - Employee Benefit Plans and Labor Agreements (Details) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2015 | Aug. 25, 2015 agreement | Sep. 30, 2014 | Dec. 31, 2018 USD ($) plan employee | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |
Matching contributions |  |  |  | $ 2.6 | $ 2.6 | $ 2.8
Matching contribution as a percentage of the daily mutual handle |  |  |  | 0.25% |  |
Matching contribution as a percentage of net video lottery revenue up to a base |  |  |  | 1.00% |  |
Matching contribution as a percentage of table revenue after the base is met |  |  |  | 0.50% |  |
Matching contribution as a percentage of poker revenue after the base is met |  |  |  | 0.84% |  |
Number of plans | plan |  |  |  | 2 |  |
Deferred compensation vesting period |  |  |  | 5 years |  |
Deferred compensation matching contributions |  |  |  | $ 2.3 | 2.2 | 2.2
Deferred compensation liability, current |  |  |  | $ 64.1 | 64.7 |
Tropicana Las Vegas |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Number of collective bargaining agreements | agreement |  | 7 |  |  |  |
Ohio Horsemans Benevolent and Protective Association |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Term of other labor agreement |  |  | 10 years |  |  |
Ohio Harness Horsemens Association |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Term of other labor agreement | 10 years |  |  |  |  |
401(k) Plan |  |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |  |
Discretionary match contribution percentage |  |  |  | 50.00% |  |
Maximum percentage of eligible employee compensation eligible for discretionary employer match contribution |  |  |  | 6.00% |  |
Matching contributions |  |  |  | $ 6.5 | $ 6.0 | $ 5.3
SEATU |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Number of employees covered under collective bargaining agreement | employee |  |  |  | 1,628 |  |
Hotel Employees And Restaurant Employees Union Local 1 |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Number of employees covered under collective bargaining agreement | employee |  |  |  | 172 |  |
United Auto Workers and United Steel Workers Council |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |
Number of employees covered under collective bargaining agreement | employee |  |  |  | 1,254 |  |

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