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Long Term Debt (Details) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2011 JPY (¥) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, total U.S. dollar-denominated debt [Member] USD ($) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] USD ($) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] JPY (¥) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] USD ($) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] JPY (¥) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] JPY (¥) | Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] JPY (¥) | Dec. 31, 2012 2003 multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member] USD ($) | Dec. 31, 2012 Revcolving Credit Facility Member [Member] USD ($) | Dec. 31, 2011 Revcolving Credit Facility Member [Member] USD ($) | Dec. 31, 2012 2010 committed loan, U.S. dollar denominated [Member] USD ($) | Dec. 31, 2011 2010 committed loan, U.S. dollar denominated [Member] USD ($) | Dec. 31, 2012 Multi-Currency Uncommitted Shelf Facility, Japanese Yen Denominated 3 [Member] JPY (¥)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original principal amount - facilities |  |  |  |  | $ 40,000,000 | [1] |  | $ 20,000,000 |  |  |  |  | ¥ 3,100,000,000 |  |  |  | ¥ 2,300,000,000 |  |  | ¥ 2,200,000,000 |  |  |  | $ 0 | [2] |  | $ 30,000,000 |  |  | ¥ 8,000,000,000 | [3]
Balance - facilities | 0 |  |  | 0 | 22,900,000 |  | 28,600,000 | 14,300,000 | 17,100,000 |  |  |  | 900,000,000 | 17,400,000 | 1,300,000,000 |  | 1,600,000,000 | 25,300,000 | 1,900,000,000 | 1,600,000,000 | 1,900,000,000 |  |  |  |  | 0 | 18,000,000 |  | 24,000,000 | 8,000,000,000 |
Interest rate - facilities (in hundredths) |  |  |  |  | 6.20% |  |  | 6.20% |  |  |  | 1.70% | 1.70% |  |  | 2.60% | 2.60% |  |  | 3.30% |  |  |  |  |  |  |  |  |  | 1.70% |
Repayment terms |  |  |  |  | Notes due July 2016 with annual principal payments that began in July 2010. |  |  | Notes due January 2017 with annual principal payments that began in January 2011. |  |  |  | Notes due April 2014 with annual principal payments that began in April 2008. | Notes due April 2014 with annual principal payments that began in April 2008. |  |  | Notes due September 2017 with annual principal payments that began in September 2011. | Notes due September 2017 with annual principal payments that began in September 2011. |  |  | Notes due January 2017 with annual principal payments that began in January 2011. |  |  |  |  |  |  |  |  |  | Notes due May 2022 with annual principal payments that begin in May 2016. |
Interest rate description - other borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Variable 30 day: 1.21% |  |  |  |
Amortization per quarter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |
Current portion of long-term debt | 39,019,000 | 28,608,000 |  |  |  |  |  |  |  | 8,600,000 | [4] |  |  |  |  |  |  |  |  |  |  | 12,400,000 | [4] |  |  |  | 18,000,000 | [4] |  |  |
Interest expense | 5,200,000 | 4,800,000 | 5,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash compensating balance per loan covenant | 65,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 39,019,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 21,019,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 15,881,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 29,026,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 23,312,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 65,725,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | $ 193,982,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | <div><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: Arial; font-size: 10pt;"><tr><td style="width: 18pt; font-family: Arial; font-size: 10pt; vertical-align: top; align: right;"><sup>(1)</sup></td><td style="width: auto; font-family: Arial; font-size: 10pt; vertical-align: top;">On May 25, 2012, we (a) entered into an amendment and restatement of our multi-currency uncommitted shelf facility to extend the termination date to May 25, 2015 and provide for the issuance of up to $150 million in additional senior promissory notes; (b) entered into an amendment and restatement of our revolving credit facility to extend the termination date to May 9, 2014; and (c) terminated pledges and guarantees of our subsidiaries as security for the multi-currency uncommitted shelf facility, committed loan and revolving credit facility. &#160;The committed loan continues to be secured by deeds of trust with respect to our corporate headquarters and distribution center in Provo, Utah.</td></tr></table></div>
[2] | <div><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: Arial; margin-left: 18pt; font-size: 10pt;"><tr><td style="width: 18pt; font-family: Arial; font-size: 10pt; vertical-align: top; align: right;"><sup>(4)</sup></td><td style="width: auto; font-family: Arial; font-size: 10pt; vertical-align: top;">On February 5, 2013, we entered into a second amendment of the amended and restated credit agreement. &#160;The amendment increased the commitment amount from $25.0 million to $100.0 million from February 2013 to February 2014, after which the commitment amount returns to the current level over a three-month period.</td></tr></table></div>
[3] | <div><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: Arial; margin-left: 18pt; font-size: 10pt;"><tr><td style="width: 18pt; font-family: Arial; font-size: 10pt; vertical-align: top; align: right;"><sup>(3)</sup></td><td style="width: auto; font-family: Arial; font-size: 10pt; vertical-align: top;">On May 31, 2012, we issued a series of yen denominated senior promissory notes under the multi-currency uncommitted shelf facility with an aggregate principal amount of 8.0 billion yen.</td></tr></table></div>
[4] | <div><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: Arial; margin-left: 18pt; font-size: 10pt;"><tr><td style="width: 18pt; font-family: Arial; font-size: 10pt; vertical-align: top; align: right;"><sup>(2)</sup></td><td style="width: auto; font-family: Arial; font-size: 10pt; vertical-align: top;">The current portion of our long-term debt (i.e. becoming due in the next 12 months) includes $12.4 million of the balance of our Japanese yen-denominated debt under the multi-currency uncommitted shelf facility, $8.6 million of the balance on our U.S. dollar denominated debt under the 2003 multi-currency uncommitted shelf facility and $18.0 million of our committed loan.</td></tr></table></div>

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