Segment Information Gross Profit by Segment and Category (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Gross Profit by Category [Line Items]
Gross Profit, Services		$ 270,976	$ 291,390
Gross Profit		339,328	347,406
North America [Member]
Gross Profit by Category [Line Items]
Gross Profit, Services		179,730	170,567
Gross Profit		215,943	194,490
EMEA [Member]
Gross Profit by Category [Line Items]
Gross Profit, Services		68,478	89,756
Gross Profit		94,890	115,237
ROW [Member]
Gross Profit by Category [Line Items]
Gross Profit, Services		22,768	31,067
Gross Profit		28,495	37,679
Local [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit	[1]	241,052	258,293
Local [Member] | North America [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit	[1]	164,018	154,776
Local [Member] | EMEA [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit	[1]	58,263	77,356
Local [Member] | ROW [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit	[1]	18,771	26,161
Goods [Member]
Gross Profit by Category [Line Items]
Gross Profit		68,352	56,016
Goods [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		16,811	17,034
Goods [Member] | Direct [Member]
Gross Profit by Category [Line Items]
Gross Profit		51,541	38,982
Goods [Member] | North America [Member]
Gross Profit by Category [Line Items]
Gross Profit		36,213	23,923
Goods [Member] | North America [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		1,673	434
Goods [Member] | North America [Member] | Direct [Member]
Gross Profit by Category [Line Items]
Gross Profit		34,540	23,489
Goods [Member] | EMEA [Member]
Gross Profit by Category [Line Items]
Gross Profit		26,412	25,481
Goods [Member] | EMEA [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		9,445	10,193
Goods [Member] | EMEA [Member] | Direct [Member]
Gross Profit by Category [Line Items]
Gross Profit		16,967	15,288
Goods [Member] | ROW [Member]
Gross Profit by Category [Line Items]
Gross Profit		5,727	6,612
Goods [Member] | ROW [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		5,693	6,407
Goods [Member] | ROW [Member] | Direct [Member]
Gross Profit by Category [Line Items]
Gross Profit		34	205
Travel [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		29,924	33,097
Travel [Member] | North America [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		15,712	15,791
Travel [Member] | EMEA [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		10,215	12,400
Travel [Member] | ROW [Member] | Third party and other [Member]
Gross Profit by Category [Line Items]
Gross Profit		$ 3,997	$ 4,906

[1] Includes gross profit from deals with local and national merchants and through local events.