Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Inventories

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

	December 31,
	2018		2017
Raw materials	$	91,610	$	87,683
Finished goods		204,211		165,771
	$	295,821	$	253,454

Inventory Reserves

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

	2018			2017			2016
Beginning balance	$	8,081		$	7,995		$	20,744
Additions		23,940			16,382			24,906
Write-offs		(17,872	)		(16,296	)		(37,655	)
Ending balance	$	14,149		$	8,081		$	7,995

Prepaid Expenses and Other

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

	December 31,
	2018		2017
Deferred charges	$	6,703	$	4,256
Prepaid inventory and import costs		2,808		9,397
Prepaid rent, insurance and other occupancy costs		8,799		14,558
Prepaid promotion and event cost		6,013		3,581
Prepaid other taxes		6,268		5,559
Forward contracts	─			158
Prepaid software license		4,006		255
Deposits		1,470		1,147
Other		15,810		13,982
	$	51,877	$	52,893

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,
	2018		2017
Deferred taxes	$	37,332	$	33,785
Deposits for noncancelable operating leases		41,986		43,375
Cash surrender value for life insurance policies		35,590		37,737
Other		29,204		49,998
	$	144,112	$	164,895

Accrued Expenses

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

	December 31,
	2018		2017
Accrued sales force commissions and other payments	$	128,022	$	151,549
Accrued income taxes		6,674		13,075
Accrued other taxes		38,693		44,580
Accrued payroll and other employee expenses		68,155		38,167
Accrued payable to vendors		34,539		29,874
Accrued royalties		3,899		2,623
Sales return reserve		3,577		4,523
Deferred revenue		20,104		12,669
Other		18,920		22,129
	$	322,583	$	319,189

Other Liabilities

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

	December 31,
	2018		2017
Deferred tax liabilities	$	18,236	$	36,718
Reserve for other tax liabilities		14,382		7,163
Liability for deferred compensation plan		36,398		43,248
Pension plan benefits reserve		3,023		6,359
Build to suit – financing obligation		9,332		10,290
Deferred rent and deferred tenant incentives		5,665		6,389
Asset retirement obligation		6,444		6,578
Other		18,436		10,371
	$	111,916	$	127,116

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):

	2018			2017			2016
Gross balance at January 1	$	5,514		$	5,290		$	7,772
Increases related to prior year tax positions		5,161		─				185
Decreases related to prior year tax positions	─				(277	)	─
Increases related to current year tax positions		3,704			669			918
Settlements		(956	)		(159	)		(3,369	)
Decreases due to lapse of statutes of limitations		(1,483	)		(187	)		(252	)
Currency adjustments		(484	)		178			36
Gross balance at December 31	$	11,456		$	5,514		$	5,290