Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Significant Accounting Policies [Abstract]

Inventories

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

	December 31,
	2019		2018
Raw materials	$	87,942	$	91,610
Finished goods		187,949		204,211
Total inventory, net	$	275,891	$	295,821

Inventory Reserves

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

	2019			2018			2017
Beginning balance	$	14,149		$	8,081		$	7,995
Additions		14,931			23,940			16,382
Write-offs		(16,785	)		(17,872	)		(16,296	)
Ending balance	$	12,295		$	14,149		$	8,081

Prepaid Expenses and Other

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

	December 31,
	2019		2018
Deferred charges	$	8,142	$	6,703
Prepaid income tax		8,905		—
Prepaid inventory and import costs		4,277		2,808
Prepaid rent, insurance and other occupancy costs		12,516		8,799
Prepaid promotion and event cost		7,159		6,013
Prepaid other taxes		7,965		6,268
Prepaid software license		3,317		4,006
Deposits		1,208		1,470
Other		16,365		15,810
Total prepaid expenses and other	$	69,854	$	51,877

Estimated Useful Lives

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,
	2019		2018
Deferred taxes	$	30,780	$	37,332
Deposits for noncancelable operating leases		46,894		41,986
Cash surrender value for life insurance policies		41,707		35,590
Other		34,635		29,204
Total other assets	$	154,016	$	144,112

Accrued Expenses

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

	December 31,
	2019		2018
Accrued sales force commissions and other payments	$	103,532	$	128,022
Accrued income taxes		—		6,674
Accrued other taxes		29,657		38,693
Accrued payroll and other employee expenses		30,610		68,155
Accrued payable to vendors		34,760		34,539
Short-term lease liability		39,349		—
Accrued royalties		514		3,899
Sales return reserve		3,903		3,577
Deferred revenue		20,162		20,104
Other		27,794		18,920
Total accrued expenses	$	290,281	$	322,583

Other Liabilities

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

	December 31,
	2019		2018
Deferred tax liabilities	$	10,741	$	18,236
Reserve for other tax liabilities		17,121		14,382
Liability for deferred compensation plan		43,238		36,398
Pension plan benefits reserve		3,454		3,023
Build to suit – financing obligation		—		9,332
Deferred rent and deferred tenant incentives		—		5,665
Asset retirement obligation		6,631		6,444
Other		15,610		18,436
Total other liabilities	$	96,795	$	111,916

Reconciliation of 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):

	2019			2018			2017
Gross balance at January 1	$	11,456		$	5,514		$	5,290
Increases related to prior year tax positions		775			5,161			—
Decreases related to prior year tax positions		—			—			(277	)
Increases related to current year tax positions		2,273			3,704			669
Settlements		—			(956	)		(159	)
Decreases due to lapse of statutes of limitations		(1,051	)		(1,483	)		(187	)
Currency adjustments		54			(484	)		178
Gross balance at December 31	$	13,507		$	11,456		$	5,514