Segment Reporting, Revenue by Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Revenue from External Customer [Line Items]
Net revenue	$ 831,180	$ 713,500
Boys [Member]
Revenue from External Customer [Line Items]
Net revenue	336,855	272,598
Games [Member]
Revenue from External Customer [Line Items]
Net revenue	231,142	235,649
Girls [Member]
Revenue from External Customer [Line Items]
Net revenue	165,353	117,127
Preschool [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 97,830	$ 88,126