Schedule II - Valuation And Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 31,552	$ 28,562	$ 19,288
Charged to Costs and Expenses	43,482	56,345	54,457
Net Deductions and other	(33,275)	(53,355)	(45,183)
Balance at End of Period	41,759	31,552	28,562
Uncollectible accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	2,149	10,940	2,864
Charged to Costs and Expenses	864	9,586	11,803
Net Deductions and other	381	(18,377)	(3,727)
Balance at End of Period	3,394	2,149	10,940
Reserve for sales returns and allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	29,403	17,622	16,424
Charged to Costs and Expenses	42,618	46,759	42,654
Net Deductions and other	(33,656)	(34,978)	(41,456)
Balance at End of Period	$ 38,365	$ 29,403	$ 17,622