Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Significant Accounting Policies [Abstract]

Inventories

Inventories consist of the following (U.S. dollars in thousands):

	December 31,
	2021		2020
Raw materials	$	179,891	$	118,877
Finished goods		220,040		195,489
Total inventory, net	$	399,931	$	314,366

Inventory Reserves

Reserves of inventories consist of the following (U.S. dollars in thousands):

	2021			2020			2019
Beginning balance	$	14,249		$	12,295		$	14,149
Additions		31,300			15,952			14,931
Write-offs		(26,906	)		(13,998	)		(16,785	)
Ending balance	$	18,643		$	14,249		$	12,295

Prepaid Expenses and Other

Prepaid expenses and other consist of the following (U.S. dollars in thousands):

	December 31,
	2021		2020
Deferred charges	$	14,266	$	10,540
Prepaid income tax		2,784		—
Prepaid inventory and import costs		6,087		4,123
Prepaid rent, insurance and other occupancy costs		3,690		9,182
Prepaid promotion and event cost		4,382		10,002
Prepaid other taxes		9,333		10,565
Prepaid software license		17,041		9,107
Deposits		1,158		33,312
Other		18,165		14,732
Total prepaid expense and other	$	76,906	$	101,563

Estimated Useful Lives

Property and equipment are stated at cost less accumulated depreciation. Depreciation is recorded using the straight-line method over the following estimated useful lives:

Buildings	39 years
Furniture and fixtures	5 - 7 years
Computers and equipment	3 - 5 years
Leasehold improvements	Shorter of estimated useful life or lease term
Scanners	3 years
Vehicles	3 - 5 years

Other Assets

Other assets consist of the following (U.S. dollars in thousands):

	December 31,
	2021		2020
Deferred taxes	$	26,483	$	35,414
Deposits for noncancelable operating leases		17,121		20,783
Cash surrender value for life insurance policies		49,851		45,453
Right-of-use assets, Financing, net		6,477		9,385
Long-term investments		35,868		11,344
Other		39,660		15,703
Total other assets	$	175,460	$	138,082

Accrued Expenses

Accrued expenses consist of the following (U.S. dollars in thousands):

	December 31,
	2021		2020
Accrued sales force commissions and other payments	$	139,793	$	149,481
Accrued income taxes		—		13,921
Accrued other taxes		31,135		45,018
Accrued payroll and other employee expenses		53,641		65,272
Accrued payable to vendors		45,347		47,201
Short-term operating lease liability		33,427		44,981
Accrued royalties		1,095		1,008
Sales return reserve		3,513		3,978
Deferred revenue		33,139		35,054
Other		31,111		40,768
Total accrued expenses	$	372,201	$	446,682

Other Liabilities

Other liabilities consist of the following (U.S. dollars in thousands):

	December 31,
	2021		2020
Deferred tax liabilities	$	2,385	$	626
Reserve for other tax liabilities		21,774		22,731
Liability for deferred compensation plan		54,213		47,543
Contingent consideration		10,341		3,125
Finance lease liabilities		5,318		7,728
Asset retirement obligation		5,408		6,717
Other		7,035		13,811
Total other liabilities	$	106,474	$	102,281

Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits included in other liabilities is as follows (U.S. dollars in thousands):

	2021			2020			2019
Gross balance at January 1	$	17,620		$	13,507		$	11,456
Increases related to prior year tax positions		4,146			2,958			775
Increases related to current year tax positions		1,794			3,302			2,273
Settlements		(5,494	)		(1,091	)		—
Decreases due to lapse of statutes of limitations		(2,409	)		(1,377	)		(1,051	)
Currency adjustments		(567	)		321			54
Gross balance at December 31	$	15,090		$	17,620		$	13,507