Selected Financial Statement Information - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts receivable, net:
Trade accounts receivable	$ 203,078	$ 108,547
Allowance for sales returns	(29,043)	(24,522)	$ (15,470)	$ (9,341)
Accrued variable consideration for sales program incentives	(20,336)	(7,041)
Allowance for doubtful accounts	(13,244)	(5,610)	$ (4,447)	$ (5,728)
Accounts receivable, net	140,455	71,374
Inventories:
Raw materials	76,140	80,474
Work-in-process	860	815
Finished goods	379,639	256,768
Inventory	456,639	338,057
Property, plant and equipment, net:
Land	7,229	7,232
Buildings and improvements	80,856	75,070
Machinery and equipment	129,680	111,055
Furniture, computers and equipment	134,719	111,793
Production molds	5,820	4,804
Construction-in-process	37,244	17,026
Property, plant and equipment, gross	395,548	326,980
Accumulated depreciation	(262,788)	(238,508)
Property, plant and equipment, net	132,760	88,472
Accounts payable and accrued expenses:
Accounts payable	67,843	42,468
Accrued expenses	196,308	127,135
Accrued goods in-transit	12,149	39,050
Accounts payable and accrued expenses	276,300	208,653
Accrued employee compensation and benefits:
Accrued payroll and taxes	34,303	31,559
Accrued vacation and sick pay	11,574	10,606
Accrued commissions	1,014	1,007
Accrued employee compensation and benefits	$ 46,891	$ 43,172