Director and Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Operating income		$ 123,612	$ 90,393	$ 90,100
Employer matching contribution, percent		3.00%
Maximum annual contribution per employee, percent		50.00%
Employer's maximum additional match, percentage		2.00%
Employer's discretionary matching contribution		4.00%
Cash contribution to profit-sharing plan		$ 3,400	2,500	2,300
Noncontributory Defined Benefit Multi-Employer Retirement Plan
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Retirement plan expense		$ 600	$ 700	$ 600
Big Fish Games
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent		3.00%
Restatement Adjustment | Correcting benefit for life-to-date appreciation of hypothetical shares from inception of the deferred plan
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Operating income	$ 2,800
Restatement Adjustment | Correcting benefit previously recognized as operating expense in 2015
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Operating income	1,500
Restatement Adjustment | Correcting benefit previously recognized as operating expense in 2006 to 2014
Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]
Operating income	$ 1,300