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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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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 |

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