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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Table) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) Website shares | Dec. 31, 2019 USD ($) Website shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares
Investment [Line Items] |  |  |  |
Short-term investments | $ 39,302 | $ 40,521 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | 3,651,000 | 4,427,000 | 5,137,000 | 5,876,000
Number of Stores | 218 | 227 |  |
Available-for-sale Securities, Gross Realized Gain (Loss) | $ 0 | $ (5) | $ (189) |
Translation Adjustment Functional to Reporting Currency, Net of Tax | (28,421) | (29,636) | (33,091) |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax | (743) | (804) | 530 |
Unrealized Gain (Loss) on Investments | 0 | 0 | (67) |
Accumulated other comprehensive loss | $ (29,164) | $ (30,440) | (32,628) | $ (25,613)
Number of E-Commerce Websites | Website | 7 | 8 |  |
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Investment [Line Items] |  |  |  |
Accumulated other comprehensive loss | $ 89 | $ 15 | $ 150 |
Certificates of Deposit [Member] |  |  |  |
Investment [Line Items] |  |  |  |
Short-term investments | $ 39,302 | $ 40,521 |  |

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