Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Table) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($) Website shares	Dec. 31, 2018 USD ($) Website shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares
Investment [Line Items]
Marketable securities – available for sale	$ 40,521	$ 66,968
Marketable securities – available for sale	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number \| shares	4,427,000	5,137,000	5,876,000	6,287,000
Number of Stores	227	229
Available-for-sale Securities, Gross Realized Gain (Loss)	$ (5)	$ (189)	$ 5
Translation Adjustment Functional to Reporting Currency, Net of Tax	(29,636)	(33,091)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(804)	530
Unrealized Gain (Loss) on Investments	0	(67)
Accumulated other comprehensive loss	$ (30,440)	(32,628)	$ (25,613)	$ (31,751)
Available-for-sale Securities, Gross Unrealized Gain		$ 67
Number of E-Commerce Websites \| Website	8	7
Bonds [Member]
Investment [Line Items]
Marketable securities – available for sale	$ 0	$ 24,617
Marketable securities – available for sale	0	0
Certificates of Deposit [Member]
Investment [Line Items]
Marketable securities – available for sale	40,521	42,351
Marketable securities – available for sale	$ 0	$ 0

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Number of E-Commerce Websites

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