Acquisitions - Narrative (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Dec. 06, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 277,263	$ 278,337	$ 251,024
Gameiom Technologies Limited [Member]
Business Acquisition [Line Items]
Seller note			$ 500
Deferred Consideration To Acquire Business, Payment Terms			18 months
Total purchase price			$ 5,000
Payments to Acquire Businesses, Gross			4,500
Goodwill			3,700
Intangible assets			$ 2,100
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			6 years 8 months
Rocket Gaming Systems [Member]
Business Acquisition [Line Items]
Finite-Lived Customer Relationships, Gross	$ 22,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	6,900
Finite-Lived Trade Names, Gross	$ 900
Estimated increase in gaming units	1,500
Total purchase price	$ 56,850
Goodwill	23,217
Intangible assets	$ 30,290
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 5 months
Business Combination, Electronic Gaming Machines, Progressive Prize, Amount	$ 1,000
In Bet Gaming [Member]
Business Acquisition [Line Items]
Total purchase price		$ 9,600
Goodwill		3,200
Intangible assets		$ 5,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		9 years