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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract] |
Inventories | NU SKIN ENTERPRISES, INC. Notes to Consolidated Financial Statements Inventories consist of the following (U.S. dollars in thousands):
| December 31, |
| 2014 |  | 2015 |
Raw materials | $ |  | 101,479 |  |  | $ | 114,193 |
Finished goods |  |  | 237,012 |  |  |  | 151,063 |
| $ |  | 338,491 |  |  | $ | 265,256 |
Adjustments to Inventories | Adjustments to inventories consist of the following (U.S. dollars in thousands):
|  | 2013 |  |  | 2014 |  |  | 2015 |
Beginning balance, adjustments to inventory carrying value |  | $ | 5,461 |  |  | $ | 5,934 |  |  | $ | 56,034 |
Additions |  |  | 12,311 |  |  |  | 77,379 |  |  |  | 38,605 |
Write-offs |  |  | (11,838 | ) |  |  | (27,279 | ) |  |  | (73,895 | )
Ending balance, adjustments to inventory carrying value |  | $ | 5,934 |  |  | $ | 56,034 |  |  | $ | 20,744 |
Property and equipment
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 |
Reconciliation of Unrecognized Tax Benefits |
| 2013 |  | 2014 |  | 2015 |
Gross balance at January 1 | $ |  | 9,045 |  | $ |  | 7,484 |  | $ |  | 5,987 |
Increases related to prior year tax positions | ─ |  | ─ |  |  |  | 1,677 |
Increases related to current year tax positions |  |  | 1,188 |  |  |  | 2,700 |  |  |  | 1,119 |
Settlements |  |  | (1,671 | ) | ─ |  | ─ |
Decreases due to lapse of statutes of limitations |  |  | (1,086 | ) |  |  | (4,106 | ) |  |  | (667 | )
Currency adjustments |  |  | 8 |  |  |  | (91 | ) |  |  | (344 | )
Gross balance at December 31 | $ |  | 7,484 |  | $ |  | 5,987 |  | $ |  | 7,772 |
At December 31, 2015, the Company had $7.8 million in unrecognized tax benefits of which $0.9 million, if recognized, would affect the effective tax rate. In comparison, at December 31, 2014, the Company had $6.0 million in unrecognized tax benefits of which $1.1 million, if recognized, would affect the effective tax rate. The Company's unrecognized tax benefits relate to multiple foreign and domestic jurisdictions. Due to potential increases in unrecognized tax benefits from the multiple jurisdictions in which the Company operates, as well as the expiration of various statutes of limitation, it is reasonably possible that the Company's gross unrecognized tax benefits, net of foreign currency adjustments, may increase within the next 12 months by a range of approximately $0 to $1 million.

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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