Segment Reporting, Revenue by Products (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Revenue from External Customer [Line Items]
Net revenue	$ 1,679,757	$ 1,470,997	$ 3,389,882	$ 2,982,155
Boys [Member]
Revenue from External Customer [Line Items]
Net revenue	605,452	593,094	1,297,358	1,206,118
Games [Member]
Revenue from External Customer [Line Items]
Net revenue	409,528	363,470	868,373	810,748
Girls [Member]
Revenue from External Customer [Line Items]
Net revenue	462,021	294,785	799,700	539,401
Preschool [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 202,756	$ 219,648	$ 424,451	$ 425,888