Segment Reporting, Revenue by Products (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Revenue from External Customer [Line Items]
Net revenue	$ 878,945	$ 797,658	$ 1,710,125	$ 1,511,158
Boys [Member]
Revenue from External Customer [Line Items]
Net revenue	355,051	340,426	691,906	613,024
Games [Member]
Revenue from External Customer [Line Items]
Net revenue	227,703	211,629	458,845	447,278
Girls [Member]
Revenue from External Customer [Line Items]
Net revenue	172,326	127,489	337,679	244,616
Preschool [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 123,865	$ 118,114	$ 221,695	$ 206,240