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Segment Information Capital Expenditures (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Additions	$ 31,336us-gaap_PropertyPlantAndEquipmentAdditions	$ 28,916us-gaap_PropertyPlantAndEquipmentAdditions	$ 69,327us-gaap_PropertyPlantAndEquipmentAdditions
North America [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Additions	6,775us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember	14,728us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember	38,543us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember
EMEA [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Additions	12,945us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EMEAMember	6,719us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EMEAMember	26,909us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EMEAMember
ROW [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Additions	$ 11,616us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = grpn_RowMember	$ 7,469us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = grpn_RowMember	$ 3,875us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_StatementBusinessSegmentsAxis = grpn_RowMember

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- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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