Intangible Assets Other Than Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	$ 5,248,000	$ 0
Amortization expense	$ 4,900,000	8,000,000	$ 8,800,000
Technology Rights | DreamPlay Toys
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		2,900,000
Trademarks and Trade Names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 2,300,000