Supplemental Consolidated Balance Sheet and Statement of Operations Information (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Sep. 30, 2011	Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015
Interest and Other Income [Abstract]
Interest income		$ 461		$ 330		$ 856		$ 557
Interest expense		(5,132)		(473)		(5,981)		(1,143)
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(4,607)		450		(5,707)		450
Foreign exchange losses, net	[1]	(1,328)		2,532		5,128		(16,965)
Other Expenses		(155)				(1,571)
Other Income				102
Other Noncash Income (Expense)								115
Other expense, net		(10,761)		2,941		(7,275)		(16,986)
Reclassification of amount included in net income (loss) from continuing operations		(1,800)				(300)		4,400
Prepaid Expense and Other Assets, Current [Abstract]
Finished goods inventories		35,812				35,812			$ 42,305
Prepaid expenses		51,554				51,554			49,134
Income taxes receivable		21,764				21,764			32,483
VAT receivable		15,623				15,623			14,305
Other		65,300	[2]			65,300	[2]		15,478
Total prepaid expenses and other current assets		190,053				190,053			153,705
Litigation Settlement, Expense		45,000			$ 8,500
Securities Litigation Deposit by the Company		39,500				39,500
Merchant and Supplier Payables [Abstract]
Accrued merchant payables		431,919				431,919			471,607
Accrued supplier payables	[3]	223,698				223,698			304,604
Total accrued merchant and supplier payables		655,617				655,617			776,211
Accrued Expenses [Abstract]
Refunds reserve		29,558				29,558			35,297
Payroll and benefits		57,531				57,531			50,454
Customer credits		32,344				32,344			32,293
Restructuring Reserve, Current		14,259				14,259			11,556
Taxes Payable, Current		9,943				9,943			13,885
Deferred revenue		41,731				41,731			40,396
Capital lease obligations		27,888				27,888			26,776
Other	[4]	190,678				190,678			192,067
Total accrued expenses		403,932				403,932			402,724
Liabilities, Noncurrent [Abstract]
Long-term tax liabilities		53,174				53,174			46,506
Capital lease obligations		25,441				25,441			30,943
Other		45,436				45,436			36,091
Total other non-current liabilities		124,051				124,051			$ 113,540
Estimated Litigation Liability, Noncurrent		45,000				45,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments, beginning of period						52,261
Unrealized loss on available-for-sale securities, net of tax, beginning of period						458
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax, beginning of period						(1,513)
Accumulated other comprehensive income, beginning of period						51,206
Other Comprehensive income, pension adjustments		19		27		46		53
Foreign currency translation adjustments, end of period		40,469				40,469
Unrealized loss on available-for-sale securities, net of tax, end of period		290				290
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax, end of period		(1,467)				(1,467)
Accumulated other comprehensive income, end of period		39,292				39,292
Reclassification of amount included in net income (loss) from continuing operations		(1,800)				(300)		4,400
Securities Litigation Expense Covered by Insurance		5,500				5,500
Accumulated Translation Adjustment [Member]
Interest and Other Income [Abstract]
Reclassification of amount included in net income (loss) from continuing operations						(7,997)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax						(3,795)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income, unrealized gain (loss) on available-for-sale securities						(11,792)
Reclassification of amount included in net income (loss) from continuing operations						(7,997)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax						(168)
Pension and Other Postretirement Plans Costs [Member]
Interest and Other Income [Abstract]
Reclassification of amount included in net income (loss) from continuing operations						0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax						46
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Reclassification of amount included in net income (loss) from continuing operations						0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income, unrealized gain (loss) on available-for-sale securities		$ (52)		$ 39		(168)		$ 176
Parent [Member]
Interest and Other Income [Abstract]
Reclassification of amount included in net income (loss) from continuing operations						(7,997)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax						(168)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax						(3,917)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income						(11,914)
Reclassification of amount included in net income (loss) from continuing operations						$ (7,997)

[1] Foreign currency gains (losses), net for the three and six months ended June 30, 2016 includes $1.8 million and $0.3 million, respectively, of net cumulative translation gains that were reclassified to earnings as a result of the Company's exit from certain countries as part of its restructuring plan. Refer to Note 9, "Restructuring," for additional information. Foreign currency gains (losses), net for the three and six months ended June 30, 2015 includes a $4.4 million loss related to the cumulative translation adjustment from the Company's legacy business in the Republic of Korea that was reclassified to earnings as a result of the Ticket Monster disposition.

[2] As of June 30, 2016, Other includes $45.0 million that was deposited in an escrow account by the Company ($39.5 million) and its insurance carrier ($5.5 million) in connection with the preliminary court approval of the settlement for the Company's securities litigation matter (see Note 7, "Commitments and Contingencies"). Final court approval of the settlement was granted on July 13, 2016.

[3] Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.

[4] As of June 30, 2016 and December 31, 2015, Other includes a $45.0 million liability for the Company's securities litigation matter (see Note 7, "Commitments and Contingencies"). Final court approval of the settlement for that matter was granted on July 13, 2016.