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Segment Information Total Assets (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 2,227,597 us-gaap_Assets |  | $ 2,042,010 us-gaap_Assets |
UNITED STATES |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 1,120,400 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = country_US |  | 1,231,300 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = country_US |
North America [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 1,150,417 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | [1] | 1,267,158 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | [1]
EMEA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 552,486 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EMEAMember |  | 616,126 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EMEAMember |
ROW [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 524,694 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = grpn_RowMember | [1] | 158,726 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = grpn_RowMember | [1]
Korea [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Assets | 388,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = country_KR |  |  |
Assets, Total [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Concentration of risk, percentage | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AssetsTotalMember |  |  |
[1] | (1)North America contains assets from the United States of $1,120.4 million and $1,231.3 million as of December 31, 2014 and 2013, respectively. Rest of World contains assets from the Republic of Korea, including those assets acquired as a part of our acquisition of Ticket Monster described in Note 3 "Business Combinations," of $388.0 million as of December 31, 2014. There were no other individual countries that represented more than 10% of consolidated total assets as of December 31, 2014 and 2013, respectively.

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