Segment Information - Worldwide Revenues by Top 3 Power Brands (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 689,246	$ 708,372
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	780,126	800,011
Operating Segments | Barbie
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	163,478	152,691
Operating Segments | Hot Wheels
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	150,536	144,940
Operating Segments | Fisher-Price and Thomas & Friends
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	172,398	187,795
Operating Segments | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	293,714	314,585
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ (90,880)	$ (91,639)