Acquisitions and Disposals (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 24, 2015	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill				$ 13,080	$ 17,355	$ 17,476
Cash received				$ 10,000	$ 0	$ 0
Slingo and Social Casino
Business Acquisition [Line Items]
Sale price	$ 18,000
Cash received	10,000
Proceeds receivable	8,000
Intangible assets disposed of	5,700
Net property, plant and equipment disposed of	300
Other net assets disposed of	400
Deferred tax liabilities disposed of	1,600
Goodwill disposed of	3,600
Foreign currency gain	500
Income tax benefit	1,600
Deferred gain recognized	$ 8,000
Slingo, Inc
Business Acquisition [Line Items]
Percentage of voting interests acquired		100.00%
Payments to acquire businesses		$ 15,600
Intangible assets acquired		8,000
Deferred tax liability recorded		2,700
Goodwill		9,900
Slingo, Inc | Developed Technology and Customer Relationships
Business Acquisition [Line Items]
Intangible assets acquired		3,500
Slingo, Inc | Trademarks and tradenames
Business Acquisition [Line Items]
Intangible assets acquired		$ 4,500
Muzicall Ltd
Business Acquisition [Line Items]
Percentage of voting interests acquired			100.00%
Payments to acquire businesses			$ 6,700
Goodwill			1,300
Deferred tax assets recorded			3,400
Muzicall Ltd | Developed Technology, tradenames and trademarks and customer relationships
Business Acquisition [Line Items]
Intangible assets acquired			$ 5,400