Commitments and Contingencies - Additional Information (Detail) $ in Millions		1 Months Ended		2 Months Ended	12 Months Ended
	Apr. 26, 2015	Jan. 31, 2010 USD ($)	Apr. 30, 1999 USD ($)	Jan. 31, 2020 USD ($) stockholder	Dec. 31, 2020 USD ($) child class lawsuit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Nov. 11, 2014 USD ($)	Jul. 26, 2013 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Royalty expense					$ 158.5	$ 220.2	$ 224.0
Liability for reported and incurred but not reported claims					12.9	$ 12.0
Number of stockholders who filed complaints | stockholder				2
Workers Compensation Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence					1.0
General And Automobile Liability Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence					0.5
Product Liability Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence				$ 2.0	5.0
Property Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence					$ 1.0
Yellowstone
Commitments and Contingencies Disclosure [Line Items]
Alleged loss of profits			$ 1.0
Unpaid accounts receivable			4.0
Alleged business investments			3.0
Initial court appointed expert estimated loss of profits			$ 1.0
Court awarded damages from counterclaim		$ 4.0
Damages including attorney fees awarded by appeals court including inflation and interest									$ 17.0
Counterclaim awarded by Appeals Court								$ 7.5	$ 7.5
Damages awarded by Appeals Court including inflation and interest								$ 14.5
Loss contingency, additional fine on claim, percent	1.00%
Sleeper
Commitments and Contingencies Disclosure [Line Items]
Number of additional lawsuits pending | lawsuit					48
Number of children with injuries or fatalities related to lawsuits | child					52
Sleeper | Minimum
Commitments and Contingencies Disclosure [Line Items]
Number of consumer classes | class					15