Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Significant Accounting Policies [Abstract]

Inventories

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

	December 31,
	2020		2019
Raw materials	$	118,877	$	87,942
Finished goods		195,489		187,949
Total inventory, net	$	314,366	$	275,891

Inventory Reserves

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

	2020			2019			2018
Beginning balance	$	12,295		$	14,149		$	8,081
Additions		15,952			14,931			23,940
Write-offs		(13,998	)		(16,785	)		(17,872	)
Ending balance	$	14,249		$	12,295		$	14,149

Prepaid Expenses and Other

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

	December 31,
	2020		2019
Deferred charges	$	10,540	$	8,142
Prepaid income tax		—		8,905
Prepaid inventory and import costs		4,123		4,277
Prepaid rent, insurance and other occupancy costs		9,182		12,516
Prepaid promotion and event cost		10,002		7,159
Prepaid other taxes		10,565		7,965
Prepaid software license		9,107		3,317
Deposits (1)		33,312		1,208
Other		14,732		16,365
Total prepaid expense and other	$	101,563	$	69,854

(1) During 2020, a deposit related to a long-term lease was reclassified to short term as we expect to convert to cash within the next twelve months.

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,
	2020		2019
Deferred taxes	$	35,414	$	30,780
Deposits for noncancelable operating leases		20,783		46,894
Cash surrender value for life insurance policies		45,453		41,707
Right-of-use assets, Financing, net		9,385		—
Other		27,047		34,635
Total other assets	$	138,082	$	154,016

Accrued Expenses

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

	December 31,
	2020		2019
Accrued sales force commissions and other payments	$	149,481	$	103,532
Accrued income taxes		13,921		—
Accrued other taxes		45,018		29,657
Accrued payroll and other employee expenses		65,272		30,610
Accrued payable to vendors		47,201		34,760
Short-term operating lease liability		44,981		39,349
Accrued royalties		1,008		514
Sales return reserve		3,978		3,903
Deferred revenue		35,054		20,162
Other		40,768		27,794
Total accrued expenses	$	446,682	$	290,281

Other Liabilities

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

	December 31,
	2020		2019
Deferred tax liabilities	$	626	$	10,741
Reserve for other tax liabilities		22,731		17,121
Liability for deferred compensation plan		47,543		43,238
Pension plan benefits reserve		2,981		3,454
Finance lease liabilities		7,728		—
Asset retirement obligation		6,717		6,631
Other		13,955		15,610
Total other liabilities	$	102,281	$	96,795

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):

	2020			2019			2018
Gross balance at January 1	$	13,507		$	11,456		$	5,514
Increases related to prior year tax positions		2,958			775			5,161
Increases related to current year tax positions		3,302			2,273			3,704
Settlements		(1,091	)		—			(956	)
Decreases due to lapse of statutes of limitations		(1,377	)		(1,051	)		(1,483	)
Currency adjustments		321			54			(484	)
Gross balance at December 31	$	17,620		$	13,507		$	11,456