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