Groupon (GRPN) 10-Q6 May 152015 Q1 Quarterly reportFinancial data

Company Profile

Cover_Document

Cover Document	3 Months Ended
Cover Document	Mar. 31, 2015	1-May-15
Entity Registrant Name	Groupon, Inc.
Entity Central Index Key	1490281
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Common Class A [Member]
Common Stock, Shares, Outstanding		674,283,590
Common Class B [Member]
Common Stock, Shares, Outstanding		2,399,976

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$975,504	$1,016,634
Accounts receivable, net	92,140	90,597
Deferred income taxes	44,379	16,271
Prepaid expenses and other current assets	184,092	192,382
Current assets held for sale	362,731	85,445
Total current assets	1,658,846	1,401,329
Property, equipment and software, net	169,966	176,004
Goodwill	224,685	236,756
Intangible assets, net	24,854	30,609
Investments	22,970	24,298
Deferred income taxes, non-current	39,453	41,323
Other non-current assets	13,877	16,173
Non-current assets held for sale	0	301,105
Total Assets	2,154,651	2,227,597
Current liabilities:
Accounts payable	17,539	13,822
Accrued merchant and supplier payables	723,593	772,156
Accrued expenses	194,311	214,260
Deferred income taxes	29,077	31,998
Other current liabilities	125,243	127,121
Current liabilities held for sale	172,375	166,239
Total current liabilities	1,262,138	1,325,596
Deferred income taxes, non-current	719	773
Other non-current liabilities	122,781	129,531
Non-current liabilities held for sale	0	6,753
Total Liabilities	1,385,638	1,462,653
Commitments and contingencies
Stockholders' Equity
Additional paid-in capital	1,873,582	1,847,420
Treasury stock, at cost	-217,000	-198,467
Accumulated deficit	-936,233	-921,960
Accumulated other comprehensive income	44,216	35,763
Total Groupon, Inc. Stockholders' Equity	764,635	762,826
Noncontrolling interests	4,378	2,118
Total Equity	769,013	764,944
Total Liabilities and Equity	2,154,651	2,227,597
Common Class A [Member]
Stockholders' Equity
Common Stock, Value, Issued	70	70
Common Class B [Member]
Stockholders' Equity
Common Stock, Value, Issued	0	0
Common Stock [Member]
Stockholders' Equity
Common Stock, Value, Issued	$0	$0

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets Parenthetical (USD $)	Mar. 31, 2015	Dec. 31, 2014
Common Stock [Member]
Condensed Consolidated Balance Sheet Parenthetical [Line Items]
Common Stock, Par Value	$0.00	$0.00
Common Stock, Shares Authorized	2,010,000,000	2,010,000,000
Common Stock, Shares, Issued	0	0
Common Stock, Shares, Outstanding	0	0
Common Class A [Member]
Condensed Consolidated Balance Sheet Parenthetical [Line Items]
Common Stock, Par Value	$0.00	$0.00
Common Stock, Shares Authorized	2,000,000,000	2,000,000,000
Common Stock, Shares, Issued	704,655,248	699,008,084
Common Stock, Shares, Outstanding	674,998,444	671,768,980
Common Class B [Member]
Condensed Consolidated Balance Sheet Parenthetical [Line Items]
Common Stock, Par Value	$0.00	$0.00
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares, Issued	2,399,976	2,399,976
Common Stock, Shares, Outstanding	2,399,976	2,399,976
Treasury Stock [Member]
Condensed Consolidated Balance Sheet Parenthetical [Line Items]
Treasury Stock, Shares	29,656,804	27,239,104

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenue:
Third party and other	$360,121	$397,702
Direct	390,235	330,713
Total revenue	750,356	728,415
Cost of revenue:
Third party and other	51,697	53,802
Direct	351,253	309,101
Total cost of revenue	402,950	362,903
Gross profit	347,406	365,512
Operating expenses:
Marketing	52,533	69,185
Selling, general and administrative	289,847	300,906
Acquisition-related (benefit) expense, net	-269	1,785
Total operating expenses	342,111	371,876
Income (loss) from operations	5,295	-6,364
Other expense, net	-19,927	-840
Loss from continuing operations before provision for income taxes	-14,632	-7,204
Provision for income taxes	2,107	14,570
Loss from continuing operations	-16,739	-21,774
Income (loss) from discontinued operations, net of tax	6,284	-13,589
Net loss	-10,455	-35,363
Net income attributable to noncontrolling interests	-3,818	-2,432
Net loss attributable to Groupon, Inc.	($14,273)	($37,795)
Basic net income (loss) per share
Continuing operations	($0.03)	($0.04)
Discontinued operations	$0.01	($0.02)
Basic, net (loss) earnings per share	($0.02)	($0.06)
Diluted net income (loss) per share
Continuing operations	($0.03)	($0.04)
Discontinued operations	$0.01	($0.02)
Diluted, net (loss) earnings per share	($0.02)	($0.06)
Weighted average number of shares outstanding, basic and diluted [Abstract]
Basic, weighted average number of shares outstanding	676,382,937	682,378,690
Diluted, weighted average number of shares outstanding	676,382,937	682,378,690

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net loss from continuing operations	($16,739)	($21,774)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	10,707	-1,224
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	26	0
Net change in unrealized gain (loss), net	137	-301
Net loss from discontinued operations	6,284	-13,589
Other comprehensive income (loss) from discontinued operations - Foreign currency translation adjustments	-2,417	-3,388
Comprehensive loss	-2,002	-40,276
Comprehensive income attributable to noncontrolling interests	-3,818	-2,329
Comprehensive loss attributable to Groupon Inc.	-5,820	-42,605
Continuing Operations [Member]
Other comprehensive (loss) income, net of tax:
Other comprehensive income	10,870	-1,525
Comprehensive loss	-5,869	-23,299
Discontinued Operations [Member]
Other comprehensive (loss) income, net of tax:
Comprehensive loss	$3,867	($16,977)

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Loss) Condensed Consolidated Statements of Comprehensive Income (Loss) Parenthetical (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income Parenthetical [Abstract]
Tax effects for change in unrealized gain (loss)	$83	($180)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	5	0
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$1,428

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total Equity [Member]
Beginning Balance, Treasury Stock, Value at Dec. 31, 2014	($198,467,000)			($198,467,000)
Beginning Balance, Equity at Dec. 31, 2014	764,944,000	70,000	1,847,420,000		-921,960,000	35,763,000	762,826,000	2,118,000	764,944,000
Beginning Balance, Shares, Outstanding at Dec. 31, 2014		701,408,060
Beginning Balance, Treasury Stock, Shares at Dec. 31, 2014				-27,239,104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	-10,455,000				-14,273,000		-14,273,000	3,818,000	-10,455,000
Foreign currency translation, net of tax	10,707,000					8,290,000	8,290,000	0	8,290,000
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax						-26,000	-26,000	0	-26,000
Unrealized gain (loss) on available-for-sale debt security, net of tax						137,000	137,000		137,000
Issuance of unvested restricted stock	984,843
Exercise of stock options, shares		184,626
Exercise of stock options, value			122,000				122,000		122,000
Vesting of restricted stock units, shares		6,101,202
Vesting of restricted stock units, value		0	0
Shares issued under employee stock purchase plan, shares		328,644
Shares issued under employee stock purchase plan, value			1,824,000				1,824,000		1,824,000
Tax withholding related to net share settlements of stock-based compensation awards, shares		-1,952,151
Tax withholding related to net share settlements of stock-based compensation awards, value			-15,390,000				-15,390,000		-15,390,000
Stock-based compensation on equity-classified awards			39,079,000				39,079,000		39,079,000
Excess tax benefits on stock-based compensation awards			527,000				527,000		527,000
Purchases of treasury stock, shares				-2,417,700
Purchases of treasury stock, value				-18,533,000			-18,533,000		-18,533,000
Partnership distributions to noncontrolling interest holders								-1,558,000	-1,558,000
Ending Balance, Equity at Mar. 31, 2015	769,013,000	70,000	1,873,582,000		-936,233,000	44,216,000	764,635,000	4,378,000	769,013,000
Ending Balance, Treasury Stock, Value at Mar. 31, 2015	($217,000,000)			($217,000,000)
Ending Balance, Treasury Stock, Shares at Mar. 31, 2015				-29,656,804
Ending Balance, Shares, Outstanding at Mar. 31, 2015		707,055,224

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net loss	($10,455)	($35,363)
Less: Income (loss) from discontinued operations	6,284	-13,589
Loss from continuing operations	-16,739	-21,774
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization of property, equipment and software	26,266	21,448
Amortization of acquired intangible assets	5,934	5,985
Stock-based compensation	35,144	22,911
Deferred income taxes	22	573
Excess tax benefits on stock-based compensation	-2,896	-5,855
Gain on equity method investments	0	-52
Gain from changes in fair value of contingent consideration	-279	-39
Impairment of investments	0	397
Change in assets and liabilities, net of acquisitions:
Restricted cash	3,245	3,536
Accounts receivable	-8,901	-20,835
Prepaid expenses and other current assets	-2,513	3,013
Accounts payable	2,244	2,313
Accrued merchant and supplier payables	-17,034	-33,523
Accrued expenses and other current liabilities	-2,470	-2,202
Other, net	18,688	9,530
Net cash provided by (used in) operating activities from continuing operations	40,711	-14,574
Net cash used in operating activities from discontinued operations	-24,355	-6,143
Net cash provided by (used in) operating activities	16,356	-20,717
Investing activities
Purchases of property and equipment and capitalized software	-18,294	-16,093
Acquisitions of businesses, net of acquired cash	-800	-42,302
Purchases of investments	0	-4,599
Settlements of liabilities related to purchase of additional interest in consolidated subsidiary	-349	0
Net cash used in investing activities from continuing operations	-19,443	-62,994
Net cash used in investing activities from discontinued operations	-624	-75,614
Net cash used in investing activities	-20,067	-138,608
Financing activities
Payments for purchases of treasury stock	-18,006	-29,840
Excess tax benefits on stock-based compensation	2,896	5,855
Taxes paid related to net share settlements of stock-based compensation awards	-14,584	-14,083
Common stock issuance costs in connection with acquisition of business	0	-158
Settlements of purchase price obligations related to acquisitions	0	-3,136
Proceeds from stock option exercises and employee stock purchase plan	1,946	2,812
Partnership distribution payments to noncontrolling interest holders	-1,558	-2,053
Payments of capital lease obligations	-3,636	-889
Net cash used in financing activities	-32,942	-41,492
Effect of exchange rate changes on cash and cash equivalents	-30,199	-831
Net decrease in cash and cash equivalents, including cash classified within current assets held for sale	-66,852	-201,648
Less: Increase in cash and cash equivalents classified within current assets held for sale	-25,722	18,006
Net decrease in cash and cash equivalents	-41,130	-219,654
Cash and cash equivalents, beginning of period	1,016,634	1,240,472
Cash and cash equivalents, end of period	975,504	1,020,818
Non-cash investing and financing activities
Equipment acquired under capital lease obligations	0	4,031
Shares issued to settle liability-classified awards and contingent consideration	0	1,041
Liability for purchases of treasury stock	901	1,368
Liability for purchase of additional interests in consolidated subsidiaries	1,249	0
Liability for purchase consideration	0	359
Discontinued Operations [Abstract]
Issuance of common stock in connection with acquisition of business	0	162,862
Continuing Operations [Member]
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Stock-based compensation	35,144	22,911
Non-cash investing and financing activities
Accounts payable and accrued expenses related to purchases of property and equipment and capitalized software	3,440	11,847
Discontinued Operations [Abstract]
Accounts payable and accrued expenses related to purchases of property and equipment and capitalized software	3,440	11,847
Discontinued Operations [Member]
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Stock-based compensation	1,100	800
Non-cash investing and financing activities
Accounts payable and accrued expenses related to purchases of property and equipment and capitalized software	415	576
Discontinued Operations [Abstract]
Accounts payable and accrued expenses related to purchases of property and equipment and capitalized software	$415	$576

Description_of_Business_and_Ba

Description of Business and Basis of Presentation	3 Months Ended
Description of Business and Basis of Presentation	Mar. 31, 2015
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract]
Description of Business and Basis of Presentation [Text Block]	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION
	Company Information
	Groupon, Inc. and subsidiaries (the "Company"), which commenced operations in October 2008, operates online local commerce marketplaces throughout the world that connect merchants to consumers by offering goods and services at a discount. The Company also offers deals on products for which it acts as the merchant of record. Customers can access the Company's deal offerings directly through its websites and mobile applications and indirectly using search engines. The Company also sends emails to its subscribers with deal offerings that are targeted by location and personal preferences.
	The Company's operations are organized into three segments: North America, EMEA, which is comprised of Europe, Middle East and Africa, and the remainder of the Company's international operations ("Rest of World"). See Note 11 "Segment Information."
	In January 2014, the Company acquired all of the outstanding equity interests of LivingSocial Korea, Inc., including its subsidiary Ticket Monster, Inc. ("Ticket Monster"), for total consideration of $259.4 million, consisting of $96.5 million in cash and $162.9 million of Class A common stock. Ticket Monster is an e-commerce company based in the Republic of Korea that connects merchants to consumers by offering goods and services at a discount. The operations of Ticket Monster were previously reported in the Company's Rest of World segment. On March 30, 2015, the Company's Board of Directors approved a transaction that would result in the deconsolidation of Ticket Monster. The Company entered into a definitive agreement with an investor group on April 19, 2015 to sell a controlling stake in that business and the proposed transaction is expected to close during the three months ending June 30, 2015. The financial results of Ticket Monster are presented as discontinued operations and its assets and liabilities are presented as held for sale in the accompanying condensed consolidated financial statements. The prior period condensed consolidated financial statements as of December 31, 2014 and for the three months ended March 31, 2014 have been retrospectively adjusted to reflect this presentation. See Note 2, "Discontinued Operations," and Note 12, "Subsequent Event," for additional information.
	Unaudited Interim Financial Information

	The Company has prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial reporting. These condensed consolidated financial statements are unaudited and, in the Company's opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the Company's condensed consolidated balance sheets, statements of operations, comprehensive income (loss), cash flows and stockholders' equity for the periods presented. Operating results for the periods presented are not necessarily indicative of the results to be expected for the full year ending December 31, 2015. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been omitted in accordance with the rules and regulations of the SEC. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014, as filed with the SEC on February 13, 2015.
	Principles of Consolidation
	The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The Company's consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly-owned subsidiaries and majority-owned subsidiaries over which the Company exercises control and variable interest entities for which the Company has determined that it is the primary beneficiary. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as "Noncontrolling interests." Equity investments in entities in which the Company does not have a controlling financial interest are accounted for under either the equity method, the cost method or as available-for-sale securities, as appropriate.
	Reclassifications
	Certain reclassifications have been made to the condensed consolidated financial statements of prior periods and the accompanying notes to conform to the current period presentation.
	Use of Estimates
	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are utilized for, but not limited to, stock-based compensation, income taxes, valuation of acquired goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

Discontinued_Operations_Notes

Discontinued Operations (Notes)	3 Months Ended
	Mar. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	DISCONTINUED OPERATIONS
	On March 30, 2015, the Company's Board of Directors approved a transaction that will result in the deconsolidation of Ticket Monster and, accordingly, its assets and liabilities are classified as held for sale in the accompanying condensed consolidated balance sheets. The Company entered into a definitive agreement with an investor group in connection with this proposed transaction on April 19, 2015. See Note 12, "Subsequent Event," for additional information. In the proposed transaction, the Company will sell the holding company that owns all of the outstanding shares of Ticket Monster to a newly formed limited partnership ("Newco") in exchange for $285.0 million in cash consideration and a minority limited partner interest in Newco.
	The Company adopted the guidance in Accounting Standards Update (ASU) 2014-08, Reporting Discontinued Operations and Disclosure of Disposals of Components of an Entity, on January 1, 2015 for disposal transactions that occur on or after that date. Under that guidance, a component of an entity is reported in discontinued operations after meeting the criteria for held-for-sale classification if the disposition represents a strategic shift that has (or will have) a major effect on the entity's operations and financial results. The Company analyzed the quantitative and qualitative factors relevant to Ticket Monster and the proposed disposition transaction and determined that those conditions for discontinued operations presentation have been met. As such, the financial results of Ticket Monster are reported within discontinued operations in the accompanying condensed consolidated financial statements.

	The gain on disposition and related tax effects that would be recognized upon closing of the proposed transaction, which is expected to occur during the three months ending June 30, 2015, would be reported within discontinued operations. After closing, the Company would account for its minority limited partner interest in Newco under the equity method, unless an irrevocable election is made by the Company at closing to account for that investment at fair value with changes in fair value reported in earnings. Income or losses related to the Company's investment in Newco after closing are expected to be reported as non-operating items within continuing operations.

	The following table summarizes the major classes of line items included in income (loss) from discontinued operations, net of tax, for the three months ended March 31, 2015 and 2014 (in thousands):



		Three Months Ended March 31,
		2015			2014
	Third party and other revenue	$	17,883		$	28,727

	Direct revenue	24,823			495

	Third party and other cost of revenue	(9,524		)	(8,549		)
	Direct cost of revenue	(25,949		)	(464		)
	Marketing expense	(5,023		)	(9,739		)
	Selling, general and administrative expense	(22,763		)	(24,059		)
	Other income, net	61			—

	Loss from discontinued operations before benefit from income taxes	(20,492		)	(13,589		)
	Benefit from income taxes	26,776			—

	Income (loss) from discontinued operations, net of tax	$	6,284		$	(13,589	)


	The Company recognized an income tax benefit from discontinued operations of $26.8 million for the three months ended March 31, 2015. That tax benefit resulted from the recognition of a deferred tax asset related to the excess of the tax basis over the financial reporting basis of the Company's investment in Ticket Monster upon meeting the criteria for held-for-sale classification. No tax benefits were recognized in relation to Ticket Monster's pre-tax losses for the three months ended March 31, 2015 and 2014 because valuation allowances have been provided against the related net deferred tax assets.

	The following table summarizes the carrying amounts of the major classes of assets and liabilities held for sale in the condensed consolidated balance sheets as of March 31, 2015 and December 31, 2014 (in thousands):



		31-Mar-15			31-Dec-14
	Cash	$	29,557		$	55,279

	Accounts receivable, net	25,703			14,557

	Deferred income taxes	502			512

	Property, equipment and software, net	6,313			6,471

	Goodwill	206,980			211,054

	Intangible assets, net	72,185			79,948

	Other assets	21,491			18,729

	Assets classified as held for sale	$	362,731		$	386,550


	Accounts payable	$	6,930		$	8,033

	Accrued merchant and supplier payables	140,142			138,411

	Accrued expenses	14,490			16,092

	Deferred income taxes	502			512

	Other liabilities	10,311			9,944

	Liabilities classified as held for sale	$	172,375		$	172,992

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2015
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	GOODWILL AND OTHER INTANGIBLE ASSETS
	The following table summarizes the Company's goodwill activity by segment for three months ended March 31, 2015 (in thousands):


			North America			EMEA			Rest of World			Consolidated
	Balance as of December 31, 2014		$	116,718		$	102,179		$	17,859		$	236,756

	Goodwill related to acquisition		152			—			—			152

	Foreign currency translation		(1		)	(10,882		)	(1,340		)	(12,223		)
	Balance as of March 31, 2015		$	116,869		$	91,297		$	16,519		$	224,685

	The following tables summarize the Company's intangible assets (in thousands):


			31-Mar-15
	Asset Category		Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Subscriber relationships		$	45,285		$	38,180		$	7,105

	Merchant relationships		7,695			7,639			56

	Trade names		10,043			6,568			3,475

	Developed technology		24,659			21,541			3,118

	Brand relationships		7,960			1,879			6,081

	Other intangible assets		16,712			11,693			5,019

	Total		$	112,354		$	87,500		$	24,854



			31-Dec-14
	Asset Category		Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Subscriber relationships		$	48,810		$	37,744		$	11,066

	Merchant relationships		8,386			8,323			63

	Trade names		10,532			6,935			3,597

	Developed technology		25,352			21,713			3,639

	Brand relationships		7,664			1,486			6,178

	Other intangible assets		17,045			10,979			6,066

	Total		$	117,789		$	87,180		$	30,609

	Amortization of intangible assets is computed using the straight-line method over their estimated useful lives, which range from 1 to 5 years. Amortization expense related to intangible assets was $5.9 million and $6.0 million for the three months ended March 31, 2015 and 2014, respectively. As of March 31, 2015, the Company's estimated future amortization expense related to intangible assets is as follows (in thousands):


	Remaining amounts in 2015		$	10,010

	2016		8,204

	2017		3,584

	2018		2,912

	2019		144

	Thereafter		—

Total		$	24,854

Investments

Investments	3 Months Ended
	Mar. 31, 2015
Investments, All Other Investments [Abstract]
Cost and Equity Method Investments Disclosure [Text Block]	INVESTMENTS
	The following table summarizes the Company's investments (dollars in thousands):


		31-Mar-15		Percent Ownership of Voting Stock			December 31, 2014		Percent Ownership of Voting Stock
	Cost and equity method investments:
	Cost method investments	$	14,082	6%	to	19%	$	15,630	6%	to	19%

	Equity method investments	1,231		21%	to	50%	1,231		21%	to	50%

	Total cost and equity method investments	15,313					16,861

	Available-for-sale securities:
	Convertible debt securities	2,757					2,527

	Redeemable preferred shares	4,900		17%	to	19%	4,910		17%	to	19%

	Total available-for-sale securities	7,657					7,437

	Total investments	$	22,970				$	24,298

	The following table summarizes the amortized cost, gross unrealized gain, gross unrealized loss and fair value of the Company's available-for-sale securities as of March 31, 2015 and December 31, 2014, respectively (in thousands):


		31-Mar-15										December 31, 2014
		Amortized Cost		Gross Unrealized Gain			Gross Unrealized Loss		Fair Value			Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	Available-for-sale securities:
	Convertible debt securities	$	2,030	$	727		$	—	$	2,757		$	2,030	$	497	$	—	$	2,527

	Redeemable preferred shares	4,599		301			—		4,900			4,599		311		—		4,910

	Total available-for-sale securities	$	6,629	$	1,028		$	—	$	7,657		$	6,629	$	808	$	—	$	7,437

Supplemental_Consolidated_Bala

Supplemental Consolidated Balance Sheet and Statement of Operations Information	3 Months Ended
	Mar. 31, 2015
SUPPLEMENTAL CONSOLIDATED BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION [Abstract]
Additional Financial Information Disclosures [Text Block]	SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION
	The following table summarizes the Company's other expense, net for the three months ended March 31, 2015 and 2014(in thousands):


			Three Months Ended March 31,
			2015				2014
	Interest income		$	227			$	376
	Interest income		$	227			$	376
	Interest expense		(670		)		(88		)
	Impairments of investments		—				(397		)
	Impairments of investments		—				(397		)
	Gain on equity method investments		—				52
	Gain on equity method investments		—				52
	Foreign exchange losses, net		(19,497		)		(747		)
	Other		13				(36		)
	Other		13				(36		)
	Other expense, net		$	(19,927	)		$	(840	)
	The following table summarizes the Company's prepaid expenses and other current assets as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Unamortized tax effects on intercompany transactions	$	8,168			$	14,170
	Unamortized tax effects on intercompany transactions	$	8,168			$	14,170
	Finished goods inventories	45,669				52,237
	Finished goods inventories	45,669				52,237
	Prepaid expenses	31,739				32,758
	Prepaid expenses	31,739				32,758
	Restricted cash	8,082				10,852
	Restricted cash	8,082				10,852
	Income taxes receivable	55,646				41,769
	Income taxes receivable	55,646				41,769
	VAT receivable	15,068				17,746
	VAT receivable	15,068				17,746
	Prepaid marketing	6,022				7,413
	Prepaid marketing	6,022				7,413
	Other	13,698				15,437
	Other	13,698				15,437
	Total prepaid expenses and other current assets	$	184,092			$	192,382
	Total prepaid expenses and other current assets	$	184,092			$	192,382

	The following table summarizes the Company's accrued merchant and supplier payables as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Accrued merchant payables	$	501,126			$	499,317
	Accrued merchant payables	$	501,126			$	499,317
	Accrued supplier payables(1)	222,467				272,839
	Accrued supplier payables(1)	222,467				272,839
	Total accrued merchant and supplier payables	$	723,593			$	772,156
	Total accrued merchant and supplier payables	$	723,593			$	772,156

	-1	Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.
	The following table summarizes the Company's accrued expenses as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Marketing	$	19,992			$	15,962
	Marketing	$	19,992			$	15,962
	Refunds reserve	30,498				32,535
	Refunds reserve	30,498				32,535
	Payroll and benefits	50,010				59,802
	Payroll and benefits	50,010				59,802
	Customer credits	32,794				42,729
	Customer credits	32,794				42,729
Professional fees	13,814				14,254
Professional fees	13,814				14,254
Other	47,203				48,978
Other	47,203				48,978
Total accrued expenses	$	194,311			$	214,260
Total accrued expenses	$	194,311			$	214,260
The following table summarizes the Company's other current liabilities as of March 31, 2015 and December 31, 2014 (in thousands):


	31-Mar-15				31-Dec-14
Income taxes payable	$	18,173			$	14,461
Income taxes payable	$	18,173			$	14,461
VAT payable	21,548				30,778
VAT payable	21,548				30,778
Sales taxes payable	5,456				9,042
Sales taxes payable	5,456				9,042
Deferred revenue	52,900				46,344
Deferred revenue	52,900				46,344
Capital lease obligations	14,499				14,872
Capital lease obligations	14,499				14,872
Other	12,667				11,624
Other	12,667				11,624
Total other current liabilities	$	125,243			$	127,121
Total other current liabilities	$	125,243			$	127,121
The following table summarizes the Company's other non-current liabilities as of March 31, 2015 and December 31, 2014 (in thousands):


	31-Mar-15				31-Dec-14
Long-term tax liabilities	$	80,255			$	82,138
Long-term tax liabilities	$	80,255			$	82,138
Deferred rent	12,903				13,200
Deferred rent	12,903				13,200
Capital lease obligations	19,063				23,387
Capital lease obligations	19,063				23,387
Other	10,560				10,806
Other	10,560				10,806
Total other non-current liabilities	$	122,781			$	129,531
Total other non-current liabilities	$	122,781			$	129,531
The following table summarizes the components of accumulated other comprehensive income, net of tax, as of March 31, 2015 and December 31, 2014 (in thousands):


	Foreign currency translation adjustments				Unrealized gain (loss) on available-for-sale securities				Pension adjustments			Total
Balance as of December 31, 2014	$	36,764			$	499			$	(1,500	)	$	35,763
Balance as of December 31, 2014	$	36,764			$	499			$	(1,500	)	$	35,763
Other comprehensive income	8,290				137				26			8,453
Other comprehensive income	8,290				137				26			8,453
Balance as of March 31, 2015	$	45,054			$	636			$	(1,474	)	$	44,216
Balance as of March 31, 2015	$	45,054			$	636			$	(1,474	)	$	44,216

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	COMMITMENTS AND CONTINGENCIES
	The Company's commitments as of March 31, 2015 did not materially change from the amounts set forth in the Company's 2014 Annual Report on Form 10-K.
	Legal Matters
	From time to time, the Company is party to various legal proceedings incident to the operation of its business. For example, the Company is currently involved in proceedings brought by stockholders, former employees and merchants, intellectual property infringement suits and suits by customers (individually or as class actions) alleging, among other things, violations of the federal securities laws, the Credit Card Accountability, Responsibility and Disclosure Act and state laws governing gift cards, stored value cards and coupons. Additionally, the Company is subject to general customer complaints seeking monetary damages, particularly in its Rest of World segment. The following is a brief description of significant legal proceedings.
	On February 8, 2012, the Company issued a press release announcing its expected financial results for the fourth quarter of 2011. After finalizing its year-end financial statements, the Company announced on March 30, 2012 revised financial results, as well as a material weakness in its internal control over financial reporting related to deficiencies in its financial statement close process. The revisions resulted in a reduction to fourth quarter 2011 revenue of $14.3 million. The revisions also resulted in an increase to fourth quarter operating expenses that reduced operating income by $30.0 million, net income by $22.6 million and earnings per share by $0.04. Following this announcement, the Company and several of its current and former directors and officers were named as parties to the following outstanding putative securities class action and purported stockholder derivative lawsuits all arising out of the same alleged events and facts.
	The Company is currently a defendant in a proceeding pursuant to which, on October 29, 2012, a consolidated amended class action complaint was filed against the Company, certain of its directors and officers, and the underwriters that participated in the initial public offering of the Company's Class A common stock. Originally filed in April 2012, the case is currently pending before the United States District Court for the Northern District of Illinois: In re Groupon, Inc. Securities Litigation. The complaint asserts claims pursuant to Sections 11 and 15 of the Securities Act of 1933 and Sections 10(b) and 20(a) of the Securities Exchange Act of 1934. Allegations in the consolidated amended complaint include that the Company and its officers and directors made untrue statements or omissions of material fact by issuing inaccurate financial statements for the fiscal quarter and the fiscal year ending December 31, 2011 and by failing to disclose information about the Company's financial controls in the registration statement and prospectus for the Company's initial public offering of Class A common stock and in the Company's subsequently-issued earnings release dated February 8, 2012. The lawsuit seeks an unspecified amount of monetary damages, reimbursement for fees and costs incurred in connection with the actions, including attorneys' fees, and various other forms of monetary and non-monetary relief. On September 25, 2014, the district court entered an order granting plaintiff's motion for class certification. The Company has filed a petition for leave to appeal that order in the United States Court of Appeals for the Seventh Circuit. On March 6, 2015, the magistrate judge entered an order denying defendants' motion to exclude the opinions and testimony of the plaintiff's proposed market efficiency expert. On March 20, 2015, defendants filed objections to the magistrate judge's order with the district court, which are currently pending. Those objections have now been fully briefed by the parties and are currently pending. The Seventh Circuit is holding the petition for leave to appeal. Meanwhile, the parties continue to be engaged in discovery, including depositions.
	In addition, federal and state purported stockholder derivative lawsuits have been filed against certain of the Company's current and former directors and officers. The federal purported stockholder derivative lawsuit was originally filed in April 2012, and a consolidated stockholder derivative complaint, filed on July 30, 2012, is currently pending in the United States District Court for the Northern District of Illinois: In re Groupon Derivative Litigation. Plaintiffs assert claims for breach of fiduciary duty and abuse of control. The state derivative cases are currently pending before the Chancery Division of the Circuit Court of Cook County, Illinois: Orrego v. Lefkofsky, et al., was filed on April 5, 2012; and Kim v. Lefkofsky, et al., was filed on May 25, 2012. The state derivative complaints generally allege that the defendants breached their fiduciary duties by purportedly mismanaging the Company's business by, among other things, failing to utilize proper accounting controls and, in the case of one of the state derivative lawsuits, by engaging in alleged insider trading of the Company's Class A common stock and misappropriating information. In addition, one state derivative case asserts a claim for unjust enrichment. The derivative lawsuits purport to seek to recoup for the Company an unspecified amount of monetary damages allegedly sustained by the Company, restitution from defendants, reimbursement for fees and costs incurred in connection with the actions, including attorneys' fees, and various other forms of monetary and non-monetary relief. On June 20, 2012, the Company and the individual defendants filed a motion requesting that the court stay the consolidated federal derivative action pending resolution of the consolidated federal class action. On July 31, 2012, the court granted defendants' motion in part, and stayed the consolidated federal derivative action pending a separate resolution of upcoming motions to dismiss in the consolidated federal class action. On June 15, 2012, the state plaintiffs filed a motion to consolidate the state derivative actions, which was granted on July 2, 2012, and on July 5, 2012, the plaintiffs filed a motion for appointment of co-lead plaintiffs and co-lead counsel, which was granted on July 27, 2012. No consolidated complaint has been filed in the state derivative action. On September 14, 2012, the court granted a motion filed by the parties requesting that the court stay the state derivative actions pending the federal court's resolution of anticipated motions to dismiss in the consolidated federal class action. On April 18, 2013, the state court appointed a lead plaintiff and approved its selection of lead counsel and local counsel for the purported derivative action. Following entry of the federal court's order denying defendants' motions to dismiss in In re Groupon Securities Litigation, the courts in both the state and federal derivative actions granted motions requesting that the respective courts extend the litigation stays currently in place pending further developments in In re Groupon, Inc. Securities Litigation.
	The Company intends to defend all of the securities and stockholder derivative lawsuits vigorously.
	In 2010, the Company was named as a defendant in a series of class actions that came to be consolidated in the U.S. District Court for the Southern District of California. The consolidated actions are referred to as In re Groupon Marketing and Sales Practices Litigation. The Company denies liability, but the parties agreed to settle the litigation for $8.5 million before any determination had been made on the merits or with respect to class certification. Because the case had been filed as a class action, the parties were required to provide proper notice to the settlement class and obtain court approval for the settlement. During that process, certain individuals asserted various objections to the settlement. The parties to the case opposed the objections and on December 14, 2012, the district court approved the settlement over the various objections.
	Subsequent to the entry of the order approving settlement, certain of the objectors filed a notice of appeal, contesting the settlement and appealing the matter to the United States Court of Appeals for the Ninth Circuit. The Company and the Plaintiffs opposed the appeal and sought confirmation of the settlement approved by the District Court. On February 19, 2015, the Court of Appeals vacated the settlement and remanded the case for further proceedings concerning the proposed settlement consistent with the Court of Appeals' opinion. The litigation is now pending in the District Court.
	The parties have the right to terminate the settlement. Pursuant to an agreement of the parties and an order of the court, the parties have until June 22, 2015 to make this election or supplement the record consistent with the opinion from the Court of Appeals in an effort to seek re-approval of the settlement. The Company is presently analyzing its options with respect to this matter.
	In addition, third parties have from time to time claimed, and others may claim in the future, that the Company has infringed their intellectual property rights. The Company is subject to intellectual property disputes, including patent infringement claims, and expects that it will increasingly be subject to intellectual property infringement claims as its services expand in scope and complexity. The Company has in the past litigated such claims, and the Company is presently involved in several patent infringement and other intellectual property-related claims, including pending litigation, some of which could involve potentially substantial claims for damages. The Company may also become more vulnerable to third party claims as laws such as the Digital Millennium Copyright Act are interpreted by the courts, and as the Company becomes subject to laws in jurisdictions where the underlying laws with respect to the potential liability of online intermediaries are either unclear or less favorable. The Company believes that additional lawsuits alleging that it has violated patent, copyright or trademark laws will be filed against it. Intellectual property claims, whether meritorious or not, are time consuming and costly to resolve, could require expensive changes in the Company's methods of doing business, or could require it to enter into costly royalty or licensing agreements.
	The Company is also subject to, or in the future may become subject to, a variety of regulatory inquiries across the jurisdictions where the Company conducts its business, including, for example, consumer protection, marketing practices, tax and privacy rules and regulations. Any regulatory actions against the Company, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, injunctive relief or increased costs of doing business through adverse judgment or settlement, require the Company to change its business practices in expensive ways, require significant amounts of management time, result in the diversion of significant operational resources or otherwise harm the Company's business.
	Certain foreign tax authorities have issued assessments totaling $41.7 million to subsidiaries of the Company for additional value-added taxes (VAT) covering periods ranging from January 2011 to May 2014, including interest and penalties through the date of the assessments. Those tax authorities are alleging that, for VAT purposes, the Company's revenues from voucher sales should reflect the total amounts collected from purchasers of those vouchers, rather than the amounts that the Company retains after deducting the portion that is payable to the featured merchants. The Company believes that the assessments are without merit and intends to vigorously defend itself in these matters.

	The Company establishes an accrued liability for loss contingencies related to legal and regulatory matters when the loss is both probable and estimable. These accruals represent management's best estimate of probable losses and in such cases, there may be an exposure to loss in excess of the amounts accrued. For each matter described above, there are inherent and significant uncertainties based on, among other factors, the stage of the proceedings, developments in the applicable facts of law, or the lack of a specific damage claim. In addition, for some matters for which a loss is probable or reasonably possible, an estimate of the amount of loss or range of loss is not possible, and we may be unable to estimate the possible loss or range of losses that could potentially result from the application of non-monetary remedies. Currently, the Company is unable to reasonably estimate the amount of reasonably possible losses in excess of the amounts accrued for the securities and stockholder derivative lawsuits. For the remaining matters described above, the Company believes that the amount of reasonably possible losses in excess of the amounts accrued would not have a material adverse effect on its business, consolidated financial position, results of operations or cash flows. The Company's accrued liabilities for loss contingencies related to legal and regulatory matters may change in the future as a result of new developments, including, but not limited to, the occurrence of new legal matters, changes in the law or regulatory environment, adverse or favorable rulings, newly discovered facts relevant to the matter, or changes in the strategy for the matter. Regardless of the outcome, litigation can have an adverse impact on the Company because of defense and settlement costs, diversion of management resources and other factors.
	Indemnifications
	In the normal course of business to facilitate transactions related to its operations, the Company indemnifies certain parties, including employees, lessors, service providers and merchants, with respect to various matters. The Company has agreed to hold certain parties harmless against losses arising from a breach of representations or covenants, or other claims made against those parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company is also subject to increased exposure to various claims as a result of its acquisitions, particularly in cases where the Company is entering into new businesses in connection with such acquisitions. The Company may also become more vulnerable to claims as it expands the range and scope of its services and is subject to laws in jurisdictions where the underlying laws with respect to potential liability are either unclear or less favorable. In addition, the Company has entered into indemnification agreements with its officers, directors and underwriters, and the Company's bylaws contain similar indemnification obligations to agents.
	It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, any payments that the Company has made under these agreements have not had a material impact on the operating results, financial position or cash flows of the Company.

Stockholders_Equity_and_Compen

Stockholders' Equity and Compensation Arrangements Stockholders' Equity and Compensation Arrangements (Note)	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity and Stock-Based Compensation Note [Text Block]	STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS
	Common Stock
	The Company's certificate of incorporation, as amended and restated, authorizes three classes of common stock: Class A common stock, Class B common stock and common stock. No shares of common stock will be issued or outstanding until October 31, 2016, at which time all outstanding shares of Class A common stock and Class B common stock will automatically convert into shares of common stock. In addition, the Company's certificate of incorporation authorizes shares of undesignated preferred stock, the rights, preferences and privileges of which may be designated from time to time by the Board.
	Share Repurchase Programs
	The Board previously authorized the Company to purchase up to $300.0 million of its outstanding Class A common stock through August 2015. During the three months ended March 31, 2015 and 2014, the Company purchased 2,417,700 and 3,075,700 shares of Class A common stock, respectively, for an aggregate purchase price of $18.5 million and $29.5 million (including fees and commissions), respectively, under this share repurchase program. As of March 31, 2015, up to $83.0 million of Class A common stock remains available for repurchase under this share repurchase program. In April 2015, the Company announced that its Board approved a new share repurchase program, under which the Company is authorized to repurchase up to an additional $300.0 million of its Class A common stock through August 2017. The new share repurchase program is subject to, and will be effective upon, the closing of the proposed Ticket Monster transaction, as discussed in Note 2, "Discontinued Operations," and Note 12, "Subsequent Event." The timing and amount of any share repurchases are determined based on market conditions, share price and other factors, and the programs may be discontinued or suspended at any time.
	Groupon, Inc. Stock Plans
	The Groupon, Inc. Stock Plans (the "Plans") are administered by the Compensation Committee of the Board, which determines the number of awards to be issued, the corresponding vesting schedule and the exercise price for options. As of March 31, 2015, 44,799,386 shares were available for future issuance under the Plans.
	The Company recognized stock-based compensation expense from continuing operations of $35.1 million and $22.9 million for the three months ended March 31, 2015 and 2014, respectively, related to stock awards issued under the Plans and acquisition-related awards. The Company recognized stock-based compensation expense from discontinued operations of $1.1 million and $0.8 million for the three months ended March 31, 2015 and 2014, respectively. The Company also capitalized $3.1 million and $2.3 million of stock-based compensation for the three months ended March 31, 2015 and 2014, respectively, in connection with internally-developed software.
	As of March 31, 2015, a total of $220.8 million of unrecognized compensation costs related to unvested stock awards and unvested acquisition-related awards are expected to be recognized over a remaining weighted-average period of 1.26 years.
	Employee Stock Purchase Plan
	The Company is authorized to grant up to 10,000,000 shares of common stock under its employee stock purchase plan ("ESPP"). For the three months ended March 31, 2015 and 2014, 328,644 and 333,824 shares of common stock were issued under the ESPP, respectively.
	Stock Options
	The table below summarizes the stock option activity for the three months ended March 31, 2015:


			Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
									(in thousands) (1)
	Outstanding at December 31, 2014		2,262,994			$	1.09	5.03	$	16,226

	Exercised		(184,626	)		$	0.66

	Forfeited		(876	)		$	2.48

	Outstanding at March 31, 2015		2,077,492			$	1.13	4.8	$	12,631


	Exercisable at March 31, 2015		2,077,492			$	1.13	4.8	$	12,631


	-1	The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of March 31, 2015 and December 31, 2014, respectively.
	Restricted Stock Units
	The restricted stock units granted under the Plans generally vest over a four-year period, with 25% of the awards vesting after one year and the remaining awards vesting on a monthly or quarterly basis thereafter. Restricted stock units are generally amortized on a straight-line basis over the requisite service period, except for restricted stock units with performance conditions, which are amortized using the accelerated method.
	The table below summarizes activity regarding unvested restricted stock units under the Plans for the three months ended March 31, 2015:


			Restricted Stock Units			Weighted- Average Grant Date Fair Value (per share)
	Unvested at December 31, 2014		41,337,927			$	7.78

	Granted		2,235,833			$	7.48

	Vested		(6,101,202	)		$	8.02

	Forfeited		(1,983,289	)		$	8.11

	Unvested at March 31, 2015		35,489,269			$	7.7

	Performance Share Units
	The Company completed its acquisition of Ticket Monster in January 2014 and approximately 2,000,000 performance share units were granted to certain key employees of that subsidiary. The vesting of these awards into shares of the Company's Class A common stock is contingent upon the subsidiary's achievement of specified financial targets over three annual performance periods for the years ending December 31, 2014, 2015 and 2016 and is subject to continued employment at the end of each performance period. If the financial targets for a performance period are not achieved, no shares will be issued for that performance period. The grant date fair value of the performance share units was $8.07 per share. No shares were issued for the 2014 annual performance period because the financial targets were not met. Stock-based compensation expense has not been recognized for the performance share units for the three months ended March 31, 2015 because it is not probable that the financial targets for the remaining annual performance periods will be achieved.
	The table below summarizes activity regarding unvested performance share units for the three months ended March 31, 2015:


			Performance Share Units			Weighted- Average Grant Date Fair Value (per share)
	Unvested at December 31, 2014		1,015,844			$	8.07

	Granted		—			$	—

	Vested		—			$	—

	Forfeited		(111,287	)		$	8.07

	Unvested at March 31, 2015		904,557			$	8.07

	Restricted Stock Awards
	The Company has granted restricted stock awards in connection with business combinations. Compensation expense on these awards is recognized on a straight-line basis over the requisite service periods.
The table below summarizes activity regarding unvested restricted stock for the three months ended March 31, 2015:


		Restricted Stock Awards			Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2014		34,067			$	15.53

Granted		984,843			$	7.42

Vested		(1,591	)		$	17.07

Forfeited		—			$	—

Unvested at March 31, 2015		1,017,319			$	7.56

Income_Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES
	The Company's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items.
	For the three months ended March 31, 2015, the Company recorded income tax expense from continuing operations of $2.1 million on pre-tax losses from continuing operations of $14.6 million, for an effective tax rate of (14.4)%. For the three months ended March 31, 2014, the Company recorded income tax expense from continuing operations of $14.6 million on pre-tax losses from continuing operations of $7.2 million, for an effective tax rate of (202.2)%.
	The Company's U.S. statutory rate is 35%. Significant factors impacting the effective tax rate for the three months ended March 31, 2015 and 2014 included losses from continuing operations in jurisdictions that the Company is not able to benefit due to uncertainty as to the realization of those losses, amortization of the tax effects of intercompany sales of intellectual property and nondeductible stock-based compensation expense.
	The Company is currently undergoing income tax audits in multiple jurisdictions. There are many factors, including factors outside of the Company's control, which influence the progress and completion of these audits. As of March 31, 2015, the Company believes that it is reasonably possible that changes of up to $19.0 million in unrecognized tax benefits may occur within the next 12 months upon closing of income tax audits or the expiration of applicable statutes of limitations.
	As of March 31, 2015 and December 31, 2014, unamortized tax effects of intercompany transactions of $8.2 million and $14.2 million, respectively, are included within "Prepaid expenses and other current assets" on the condensed consolidated balance sheets. As of March 31, 2015, the estimated future amortization of the tax effects of intercompany transactions is $8.2 million for the remainder of 2015. These amounts exclude the benefits, if any, for tax deductions in other jurisdictions that the Company may be entitled to as a result of the related intercompany transactions.
	See Note 2, "Discontinued Operations," for discussion of the income tax provision (benefit) from discontinued operations for the three months ended March 31, 2015 and 2014.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
FAIR VALUE MEASUREMENTS [Abstract]
Fair Value Measurements [Text Block]	FAIR VALUE MEASUREMENTS
	Fair value is defined under U.S. GAAP as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability.
	To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs in valuation methodologies used to measure fair value:
	Level 1 - Measurements that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.
	Level 2 - Measurements that include other inputs that are directly or indirectly observable in the marketplace.
	Level 3 - Measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. These fair value measurements require significant judgment.
	In determining fair value, the Company uses various valuation approaches within the fair value measurement framework. The valuation methodologies used for the Company's assets and liabilities measured at fair value and their classification in the valuation hierarchy are summarized below:
	Cash equivalents - Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. The Company classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets.
	Available-for-sale securities - The Company has investments in redeemable preferred shares and convertible debt securities issued by nonpublic entities. The Company measures the fair value of available-for-sale securities using the discounted cash flow method, which is an income approach, and the probability-weighted expected return method, which is an income approach that incorporates probability-weighted outcomes.
	The Company has classified its investments in available-for-sale securities as Level 3 due to the lack of observable market data over fair value inputs such as cash flow projections, discount rates and probability-weightings. Increases in projected cash flows and decreases in discount rates contribute to increases in the estimated fair values of available-for-sale securities, whereas decreases in projected cash flows and increases in discount rates contribute to decreases in their fair values. Additionally, increases in the probabilities of favorable investment outcomes, such as a sale or initial public offering of the investee, and decreases in the probabilities of unfavorable outcomes, such as a default by the investee, contribute to increases in the estimated fair value of available-for-sale securities, whereas decreases in the probabilities of favorable investment outcomes and increases in the probabilities of unfavorable investment outcomes contribute to decreases in their fair values.
	Contingent consideration - The Company has contingent obligations to transfer cash or shares to the former owners of acquired businesses if specified financial results are met over future reporting periods (i.e. earn-outs). The Company also has a contingent obligation to transfer up to $1.1 million of cash or shares to the former owners of an acquired business if the Company's share price is less than $6.48 per share on June 8, 2015. Liabilities for contingent consideration are measured at fair value each reporting period, with the acquisition-date fair value included as part of the consideration transferred and subsequent changes in fair value are recorded in earnings within "Acquisition-related expense (benefit), net" on the condensed consolidated statements of operations.
	The Company uses an income approach to value contingent consideration obligations based on future financial performance, which is determined based on the present value of probability-weighted future cash flows. The Company has generally classified the contingent consideration liabilities as Level 3 due to the lack of relevant observable market data over fair value inputs such as probability-weighting of payment outcomes. Increases in the assessed likelihood of a higher payout under a contingent consideration arrangement contribute to increases in the fair value of the related liability. Conversely, decreases in the assessed likelihood of a higher payout under a contingent consideration arrangement contribute to decreases in the fair value of the related liability. The Company uses a Black-Scholes-Merton option pricing model to value the contingent consideration obligation that is payable upon declines in the Company's share price. Increases in volatility and decreases in the Company's share price contribute to the increases in the fair value of that contingent consideration liability. Conversely, decreases in volatility and increases in the Company's share price contribute to decreases in the fair value of the contingent consideration liability. Changes in assumptions could have an impact on the payout of contingent consideration arrangements with a maximum payout of $8.1 million.
	The following tables summarize the Company's assets and liabilities that are measured at fair value on a recurring basis (in thousands):


					Fair Value Measurement at Reporting Date Using
	Description	31-Mar-15			Quoted Prices in Active Markets for				Significant Other		Significant
					Identical Assets				Observable		Unobservable
					(Level 1)				Inputs		Inputs
									(Level 2)		(Level 3)
	Assets:
	Cash equivalents	$	440,616		$	440,616			$	—	$	—

	Available-for-sale securities:
	Convertible debt securities	2,757			—				—		2,757

	Redeemable preferred shares	4,900			—				—		4,900


	Liabilities:
	Contingent consideration	1,373			—				—		1,373



					Fair Value Measurement at Reporting Date Using
	Description	31-Dec-14			Quoted Prices in Active Markets for				Significant Other		Significant
					Identical Assets				Observable		Unobservable
					(Level 1)				Inputs		Inputs
									(Level 2)		(Level 3)
	Assets:
	Cash equivalents	$	440,596		$	440,596			$	—	$	—

	Available-for-sale securities:
	Convertible debt securities	2,527			—				—		2,527

	Redeemable preferred shares	4,910			—				—		4,910


	Liabilities:
	Contingent consideration	1,983			—				—		1,983

	The following table provides a roll-forward of the fair value of recurring Level 3 fair value measurements for the three months ended March 31, 2015 and 2014 (in thousands):


			Three Months Ended March 31,
			2015			2014
	Assets
	Available-for-sale securities
	Convertible debt securities:
	Beginning Balance		$	2,527		$	3,174

	Total gains (losses) included in other comprehensive income		230			(481		)

	Ending Balance		$	2,757		$	2,693

Unrealized gains (losses) still held(1)		$	230		$	(481	)

Redeemable preferred shares:
Beginning Balance		$	4,910		$	—

Purchase of redeemable preferred shares		—			4,599

Total (losses) gains included in other comprehensive income		(10		)	—

Ending Balance		$	4,900		$	4,599

Unrealized (losses) gains still held(1)		$	(10	)	$	—


Liabilities
Contingent Consideration:
Beginning Balance		$	1,983		$	606

Settlements of contingent consideration liabilities		—			(424		)

Reclass to non-fair value liabilities when no longer contingent		(331		)	(143		)
Total gains included in earnings(2)		(279		)	(39		)
Ending Balance		$	1,373		$	—

Unrealized (gains) losses still held(1)		$	(279	)	$	—


-1	Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

-2	Changes in the fair value of contingent consideration liabilities are classified within "Acquisition-related expense (benefit), net" on the condensed consolidated statements of operations.
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Certain assets and liabilities are measured at fair value on a nonrecurring basis, including assets that are written down to fair value as a result of an impairment. The Company did not record any significant nonrecurring fair value measurements after initial recognition for the three months ended March 31, 2015 and 2014.

Estimated Fair Value of Financial Assets and Liabilities Not Measured at Fair Value
The following table presents the carrying amounts and fair values of financial instruments that are not carried at fair value in the consolidated financial statements (in thousands):


		31-Mar-15							31-Dec-14
		Carrying Amount			Fair Value				Carrying Amount		Fair Value
Cost method investments		$	14,082		$	14,316			$	15,630	$	16,134

The fair values of the Company's cost method investments were determined using the market approach or the income approach, depending on the availability of fair value inputs such as financial projections for the investees and market multiples for comparable companies. The Company has classified the fair value measurements of its cost method investments as Level 3 measurements within the fair value hierarchy because they involve significant unobservable inputs such as cash flow projections and discount rates.
The Company's other financial instruments not carried at fair value consist primarily of short term certificates of deposit, accounts receivable, restricted cash, accounts payable, accrued merchant and supplier payables and accrued expenses. The carrying values of these assets and liabilities approximate their respective fair values as of March 31, 2015 and December 31, 2014 due to their short-term nature.

Loss_Per_Share_of_Class_A_and_

Loss Per Share of Class A and Class B Common Stock	3 Months Ended
	Mar. 31, 2015
LOSS PER SHARE OF CLASS A AND CLASS B COMMON STOCK [Abstract] [Abstract]
Loss Per Share of Class A and Class B Common Stock [Text Block]	LOSS PER SHARE OF CLASS A AND CLASS B COMMON STOCK
	The Company computes net loss per share of Class A and Class B common stock using the two-class method. Basic net loss per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted-average number of common shares and the effect of potentially dilutive equity awards outstanding during the period. Potentially dilutive securities consist of stock options, restricted stock units, unvested restricted stock awards, performance share units and ESPP shares. The dilutive effect of these equity awards is reflected in diluted net loss per share by application of the treasury stock method. The computation of the diluted net loss per share of Class A common stock assumes the conversion of Class B common stock, if dilutive, while the diluted net loss per share of Class B common stock does not assume the conversion of those shares.
	The rights, including the liquidation and dividend rights, of the holders of Class A and Class B common stock are identical, except with respect to voting. Under the two-class method, the undistributed earnings for each period are allocated based on the contractual participation rights of the Class A and Class B common shares as if the earnings for the period had been distributed. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis. Further, as the Company assumes the conversion of Class B common stock, if dilutive, in the computation of the diluted net loss per share of Class A common stock, the undistributed earnings are equal to net income for that computation.
	The following table sets forth the computation of basic and diluted net loss per share of Class A and Class B common stock for the three months ended March 31, 2015 and 2014 (in thousands, except share amounts and per share amounts):


			Three Months Ended March 31,
			2015							2014
			Class A				Class B			Class A			Class B
	Basic net loss per share:
	Numerator
	Allocation of net loss - continuing operations		$	(16,681	)		$	(58	)	$	(21,698	)	$	(76	)
	Less: Allocation of net income attributable to noncontrolling interests		3,804				14			2,423			9

	Allocation of net loss attributable to common stockholders - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Allocation of net income (loss) attributable to common stockholders - discontinued operations		6,261				23			(13,541		)	(48		)

	Allocation of net loss attributable to common stockholders		$	(14,224	)		$	(49	)	$	(37,662	)	$	(133	)
	Denominator
	Weighted-average common shares outstanding		673,982,961				2,399,976			679,978,714			2,399,976

	Basic net income (loss) per share:
	Continuing operations		$	(0.03	)		$	(0.03	)	$	(0.04	)	$	(0.04	)
	Discontinued operations		0.01				0.01			(0.02		)	(0.02		)

	Basic net loss per share		$	(0.02	)		$	(0.02	)	$	(0.06	)	$	(0.06	)

	Diluted net loss per share:
	Numerator
	Allocation of net loss attributable to common stockholders for basic computation - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Reallocation of net income (loss) attributable to common stockholders as a result of conversion of Class B(1)		—				—			—			—

	Allocation of net loss attributable to common stockholders - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Allocation of net income (loss) attributable to common stockholders for basic computation - discontinued operations		$	6,261			$	23		$	(13,541	)	$	(48	)

	Reallocation of net income (loss) attributable to common stockholders as a result of conversion of Class B(1)		—				—			—			—

	Allocation of net loss attributable to common stockholders - discontinued operations		6,261				23			(13,541		)	(48		)

	Allocation of net loss attributable to common stockholders		$	(14,224	)		$	(49	)	$	(37,662	)	$	(133	)
	Denominator
	Weighted-average common shares outstanding used in basic computation		673,982,961				2,399,976			679,978,714			2,399,976

	Conversion of Class B(1)		—				—			—			—

	Employee stock options(1)		—				—			—			—

	Restricted shares and RSUs(1)		—				—			—			—

	Weighted-average diluted shares outstanding(1)		673,982,961				2,399,976			679,978,714			2,399,976

	Diluted net income (loss) per share:
	Continuing operations		$	(0.03	)		$	(0.03	)	$	(0.04	)	$	(0.04	)
	Discontinued operations		0.01				0.01			(0.02		)	(0.02		)

	Diluted net loss per share		$	(0.02	)		$	(0.02	)	$	(0.06	)	$	(0.06	)

	-1	Conversion of Class B shares into Class A shares and outstanding equity awards have not been reflected in the diluted net loss per share calculation for the three months ended March 31, 2015 and 2014 because the effect would be antidilutive.
	The following weighted-average outstanding equity awards are not included in the diluted loss per share calculation above because they would have had an antidilutive effect:


			Three Months Ended March 31,
			2015			2014
	Stock options		2,135,535			3,233,467

Restricted stock units		38,057,394			40,166,021

Restricted stock		580,796			77,008

ESPP shares		621,237			422,873

Total		41,394,962			43,899,369

In addition to the antidilutive awards as set forth in the table above, the Company also had 909,142 and 132,215 weighted-average outstanding performance share units during the three months ended March 31, 2015 and 2014, respectively. Contingently issuable shares are excluded from the computation of diluted EPS if, based on current period results, the shares would not be issuable if the end of the reporting period were the end of the contingency period. These outstanding performance share units have been excluded from the table above for the three months ended March 31, 2015 and 2014 as the performance conditions were not satisfied as of the end of the respective periods.

Segment_Information

Segment Information	3 Months Ended
Segment Information	Mar. 31, 2015
SEGMENT INFORMATION [Abstract]
Segment Reporting Disclosure [Text Block]	SEGMENT INFORMATION
	The Company organizes its operations into three segments: North America, EMEA and Rest of World. Segment operating results reflect earnings before stock-based compensation, acquisition-related expense (benefit), net, other expense, net and provision for income taxes. Segment information reported in the tables below represents the operating segments of the Company organized in a manner consistent with which separate information is available and for which segment results are evaluated regularly by the Company's chief operating decision-maker in assessing performance and allocating resources.
	Revenue and profit or loss information by reportable segment reconciled to consolidated net loss for the three months ended March 31, 2015 and 2014 were as follows (in thousands):



			Three Months Ended March 31,
			2015				2014
	North America
	Revenue(1)		$	479,882			$	431,062
	Revenue(1)		$	479,882			$	431,062
	Segment cost of revenue and operating expenses(2)		455,216				419,677
	Segment cost of revenue and operating expenses(2)		455,216				419,677
	Segment operating income(2)		24,666				11,385
	Segment operating income(2)		24,666				11,385
	EMEA
	Revenue(1)		216,220				230,893
	Revenue(1)		216,220				230,893
	Segment cost of revenue and operating expenses(2)		196,568				211,970
	Segment cost of revenue and operating expenses(2)		196,568				211,970
	Segment operating income(2)		19,652				18,923
	Segment operating income(2)		19,652				18,923
	Rest of World
	Revenue		54,254				66,460
	Revenue		54,254				66,460
	Segment cost of revenue and operating expenses(2)		58,402				78,436
	Segment cost of revenue and operating expenses(2)		58,402				78,436
	Segment operating loss(2)		(4,148		)		(11,976		)
	Consolidated
	Revenue		750,356				728,415
	Revenue		750,356				728,415
	Segment cost of revenue and operating expenses(2)		710,186				710,083
	Segment cost of revenue and operating expenses(2)		710,186				710,083
	Segment operating income(2)		40,170				18,332
	Segment operating income(2)		40,170				18,332
	Stock-based compensation		35,144				22,911
	Stock-based compensation		35,144				22,911
	Acquisition-related (benefit) expense, net		(269		)		1,785
	Acquisition-related (benefit) expense, net		(269		)		1,785
	Income (loss) from operations		5,295				(6,364		)
	Income (loss) from operations		5,295				(6,364		)
	Other expense, net		(19,927		)		(840		)
	Loss from continuing operations before provision for income taxes		(14,632		)		(7,204		)
	Provision for income taxes		2,107				14,570
	Provision for income taxes		2,107				14,570
	Loss from continuing operations		(16,739		)		(21,774		)
	Income (loss) from discontinued operations, net of tax		6,284				(13,589		)
	Income (loss) from discontinued operations, net of tax		6,284				(13,589		)
	Net loss		$	(10,455	)		$	(35,363	)

	-1	North America includes revenue from the United States of $473.1 million and $419.9 million for the three months ended March 31, 2015 and 2014, respectively. EMEA includes revenue from Switzerland of $117.5 million and $91.9 million for the three months ended March 31, 2015 and 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three months ended March 31, 2015 and 2014.

	-2	Segment cost of revenue and operating expenses and segment operating income (loss) exclude stock-based compensation and acquisition-related (benefit) expense, net. This presentation corresponds to the measure of segment profit or loss that the Company's chief operating decision-maker uses in assessing segment performance and making resource allocation decisions. The following table summarizes the Company's stock-based compensation expense and acquisition-related expense (benefit), net by reportable segment for the three months ended March 31, 2015 and 2014 (in thousands):


			Three Months Ended March 31,
			2015								2014
			Stock-based compensation				Acquisition-related				Stock-based compensation				Acquisition-related
	North America		$	31,252			$	(269	)		$	19,479			$	1,641
	North America		$	31,252			$	(269	)		$	19,479			$	1,641
	EMEA		2,647								2,273				144
	EMEA		2,647								2,273				144
	Rest of World		1,245				—				1,159				—
	Rest of World		1,245				—				1,159				—
Consolidated		$	35,144			$	(269	)		$	22,911			$	1,785
Consolidated		$	35,144			$	(269	)		$	22,911			$	1,785
Acquisition-related expense (benefit), net for the North America segment includes external transaction costs and gains and losses relating to contingent consideration obligations incurred by U.S. legal entities relating to purchases of businesses that became part of the EMEA and Rest of World segments, which is consistent with the attribution used for internal reporting purposes.
The following table summarizes the Company's total assets by reportable segment as of March 31, 2015 and December 31, 2014 (in thousands):


	31-Mar-15				31-Dec-14
North America (1)	$	1,125,623			$	1,150,417
North America (1)	$	1,125,623			$	1,150,417
EMEA	506,295				552,486
EMEA	506,295				552,486
Rest of World	160,002				138,144
Rest of World	160,002				138,144
Assets held for sale (1)	362,731				386,550
Assets held for sale (1)	362,731				386,550
Consolidated total assets	$	2,154,651			$	2,227,597
Consolidated total assets	$	2,154,651			$	2,227,597

-1	North America contains assets from the United States of $1,122.9 million and $1,120.4 million as of March 31, 2015 and December 31, 2014, respectively. Assets held for sale contains assets from the Republic of Korea of $362.7 million and $386.6 million as of March 31, 2015 and December 31, 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total assets as of March 31, 2015 and December 31, 2014.
Category Information
The Company offers goods and services through three primary categories: Local Deals ("Local"), Groupon Goods ("Goods") and Groupon Getaways ("Travel"). The Company also earns advertising revenue, payment processing revenue, point of sale revenue and commission revenue. Revenue and gross profit from these other sources, which are primarily generated through the Company's relationships with local and national merchants, are included within the Local category in the tables below.

The following table summarizes the Company's third party and other and direct revenue from continuing operations by category for its three reportable segments for the three months ended March 31, 2015 and 2014 (in thousands):


	North America								EMEA								Rest of World					Consolidated
	Three Months Ended								Three Months Ended								Three Months Ended					Three Months Ended
	March 31,								March 31,								March 31,					March 31,
	2015				2014				2015				2014				2015		2014			2015		2014
Local (1):
Third party and other	$	180,864			$	177,247			$	82,536			$	109,120			$	30,281	$	38,932		$	293,681	$	325,299
Third party and other	$	180,864			$	177,247			$	82,536			$	109,120			$	30,281	$	38,932		$	293,681	$	325,299

Goods:
Third party	648				1,321				11,978				17,475				12,613		15,443			25,239		34,239
Third party	648				1,321				11,978				17,475				12,613		15,443			25,239		34,239
Direct	278,381				236,114				106,989				89,414				4,865		5,185			390,235		330,713
Direct	278,381				236,114				106,989				89,414				4,865		5,185			390,235		330,713
Total	279,029				237,435				118,967				106,889				17,478		20,628			415,474		364,952
Total	279,029				237,435				118,967				106,889				17,478		20,628			415,474		364,952

Travel:
Third party	19,989				16,380				14,717				14,884				6,495		6,900			41,201		38,164
Third party	19,989				16,380				14,717				14,884				6,495		6,900			41,201		38,164

Total revenue	$	479,882			$	431,062			$	216,220			$	230,893			$	54,254	$	66,460		$	750,356	$	728,415
Total revenue	$	479,882			$	431,062			$	216,220			$	230,893			$	54,254	$	66,460		$	750,356	$	728,415

-1	Includes revenue from deals with local and national merchants and through local events.
The following table summarizes the Company's gross profit from continuing operations by category for its three reportable segments for the three months ended March 31, 2015 and 2014 (in thousands):


	North America								EMEA								Rest of World					Consolidated
	Three Months Ended								Three Months Ended								Three Months Ended					Three Months Ended
	March 31,								March 31,								March 31,					March 31,
	2015				2014				2015				2014				2015		2014			2015		2014
Local (1):
Third party and other	$	154,776			$	152,622			$	77,356			$	100,066			$	26,161	$	31,798		$	258,293	$	284,486
Third party and other	$	154,776			$	152,622			$	77,356			$	100,066			$	26,161	$	31,798		$	258,293	$	284,486

Goods:
Third party	434				1,160				10,193				15,722				6,407		8,776			17,034		25,658
Third party	434				1,160				10,193				15,722				6,407		8,776			17,034		25,658
Direct	23,489				11,444				15,288				11,580				205		(1,412		)	38,982		21,612
Direct	23,489				11,444				15,288				11,580				205		(1,412		)	38,982		21,612
Total	23,923				12,604				25,481				27,302				6,612		7,364			56,016		47,270
Total	23,923				12,604				25,481				27,302				6,612		7,364			56,016		47,270

Travel:
Third party	15,791				14,442				12,400				13,669				4,906		5,645			33,097		33,756
Third party	15,791				14,442				12,400				13,669				4,906		5,645			33,097		33,756

Total gross profit	$	194,490			$	179,668			$	115,237			$	141,037			$	37,679	$	44,807		$	347,406	$	365,512
Total gross profit	$	194,490			$	179,668			$	115,237			$	141,037			$	37,679	$	44,807		$	347,406	$	365,512

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

Subsequent_Events_Notes

Subsequent Events (Notes)	3 Months Ended
Subsequent Events (Notes)	Mar. 31, 2015
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENT
	On April 19, 2015, a subsidiary of the Company entered into a definitive agreement with an investor group pursuant to which, subject to certain conditions described in the agreement, (a) the investor group will contribute $360.0 million in cash to Newco in exchange for 72,000,000 Class A Units of Newco, unless it exercises its right to assign the purchase of up to 2,000,000 Class A Units of Newco to Mr. Daniel Shin (current chief executive officer and founder of Ticket Monster), and (b) the Company's subsidiary will contribute all of the issued and outstanding shares of the holding company that owns Ticket Monster to Newco in exchange for (i) 64,000,000 Class B Units of Newco and (ii) $285.0 million in cash consideration. Additionally, management of Newco will receive Class C units that are subject to time-based vesting conditions and, for a portion of those Class C units, performance-based vesting conditions.
	Assuming full vesting of the Series C units upon achievement of the time-based and performance-based vesting conditions, the Company's ownership interest will be approximately 41%. The Board of Newco will be composed of seven directors, consisting of the chief executive officer of Ticket Monster, four directors designated by the investor group, one director designated by Groupon and one director designated by Mr. Daniel Shin. The Class A units of Newco will be entitled to a $486.0 million liquidation preference, which must be paid before any distributions can be made to the Class B units and Class C units. Distributions in excess of $486.0 million will be made to the respective classes of partnership units in accordance with the terms of Newco's distribution waterfall.
	The agreement contains customary representations, warranties and covenants by the Company regarding the operation of the Ticket Monster business through closing of the transaction. The parties have also agreed to certain non-competition and non-solicitation covenants, including that the Company and its affiliates will not compete with the business of Newco and its affiliates in the Republic of Korea for a period ending on the later of four years from the closing date of the proposed transaction or such date that the Company holds less than a five percent direct or indirect ownership interest in Newco. Additionally, the Company will indemnify the investor group and its affiliated parties (other than Ticket Monster and the holding company that owns Ticket Monster) for breaches of its representations and warranties, breaches of covenants, and certain other matters, including certain pre-closing tax matters.
	Consummation of the proposed transaction is subject to customary closing conditions for transactions of this nature, including approval from the Korean Fair Trade Commission (the "KFTC"). In addition, the proposed transaction is subject to termination by either party if it is not consummated by July 31, 2015, subject to a 60-day extension if KFTC approval has not been received by such date.

Description_of_Business_and_Ba1

Description of Business and Basis of Presentation Description of Business, Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation
Consolidation, Policy [Policy Text Block]	The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The Company's consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly-owned subsidiaries and majority-owned subsidiaries over which the Company exercises control and variable interest entities for which the Company has determined that it is the primary beneficiary. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as "Noncontrolling interests." Equity investments in entities in which the Company does not have a controlling financial interest are accounted for under either the equity method, the cost method or as available-for-sale securities, as appropriate.
Reclassification, Policy [Policy Text Block]	Reclassifications
Reclassification, Policy [Policy Text Block]	Certain reclassifications have been made to the condensed consolidated financial statements of prior periods and the accompanying notes to conform to the current period presentation.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates
Use of Estimates, Policy [Policy Text Block]	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are utilized for, but not limited to, stock-based compensation, income taxes, valuation of acquired goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	The following table summarizes the major classes of line items included in income (loss) from discontinued operations, net of tax, for the three months ended March 31, 2015 and 2014 (in thousands):



		Three Months Ended March 31,
		2015			2014
	Third party and other revenue	$	17,883		$	28,727

	Direct revenue	24,823			495

	Third party and other cost of revenue	(9,524		)	(8,549		)
	Direct cost of revenue	(25,949		)	(464		)
	Marketing expense	(5,023		)	(9,739		)
	Selling, general and administrative expense	(22,763		)	(24,059		)
	Other income, net	61			—

	Loss from discontinued operations before benefit from income taxes	(20,492		)	(13,589		)
	Benefit from income taxes	26,776			—

	Income (loss) from discontinued operations, net of tax	$	6,284		$	(13,589	)

	The following table summarizes the carrying amounts of the major classes of assets and liabilities held for sale in the condensed consolidated balance sheets as of March 31, 2015 and December 31, 2014 (in thousands):



		31-Mar-15			31-Dec-14
	Cash	$	29,557		$	55,279

	Accounts receivable, net	25,703			14,557

	Deferred income taxes	502			512

	Property, equipment and software, net	6,313			6,471

	Goodwill	206,980			211,054

	Intangible assets, net	72,185			79,948

	Other assets	21,491			18,729

	Assets classified as held for sale	$	362,731		$	386,550


	Accounts payable	$	6,930		$	8,033

	Accrued merchant and supplier payables	140,142			138,411

	Accrued expenses	14,490			16,092

	Deferred income taxes	502			512

	Other liabilities	10,311			9,944

	Liabilities classified as held for sale	$	172,375		$	172,992

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]
Schedule of Goodwill [Table Text Block]	The following table summarizes the Company's goodwill activity by segment for three months ended March 31, 2015 (in thousands):


		North America			EMEA			Rest of World			Consolidated
	Balance as of December 31, 2014	$	116,718		$	102,179		$	17,859		$	236,756

	Goodwill related to acquisition	152			—			—			152

	Foreign currency translation	(1		)	(10,882		)	(1,340		)	(12,223		)
	Balance as of March 31, 2015	$	116,869		$	91,297		$	16,519		$	224,685

Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]	The following tables summarize the Company's intangible assets (in thousands):


		31-Mar-15
	Asset Category	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Subscriber relationships	$	45,285		$	38,180		$	7,105

	Merchant relationships	7,695			7,639			56

	Trade names	10,043			6,568			3,475

	Developed technology	24,659			21,541			3,118

	Brand relationships	7,960			1,879			6,081

	Other intangible assets	16,712			11,693			5,019

	Total	$	112,354		$	87,500		$	24,854



		31-Dec-14
	Asset Category	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Subscriber relationships	$	48,810		$	37,744		$	11,066

	Merchant relationships	8,386			8,323			63

	Trade names	10,532			6,935			3,597

	Developed technology	25,352			21,713			3,639

	Brand relationships	7,664			1,486			6,178

	Other intangible assets	17,045			10,979			6,066

	Total	$	117,789		$	87,180		$	30,609

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	As of March 31, 2015, the Company's estimated future amortization expense related to intangible assets is as follows (in thousands):


	Remaining amounts in 2015	$	10,010

	2016	8,204

	2017	3,584

	2018	2,912

	2019	144

	Thereafter	—

	Total	$	24,854

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, All Other Investments [Abstract]
Schedule of Cost and Equity Method Investments [Table Text Block]	The following table summarizes the Company's investments (dollars in thousands):


		31-Mar-15		Percent Ownership of Voting Stock			December 31, 2014		Percent Ownership of Voting Stock
	Cost and equity method investments:
	Cost method investments	$	14,082	6%	to	19%	$	15,630	6%	to	19%

	Equity method investments	1,231		21%	to	50%	1,231		21%	to	50%

	Total cost and equity method investments	15,313					16,861

	Available-for-sale securities:
	Convertible debt securities	2,757					2,527

	Redeemable preferred shares	4,900		17%	to	19%	4,910		17%	to	19%

	Total available-for-sale securities	7,657					7,437

	Total investments	$	22,970				$	24,298

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	The following table summarizes the amortized cost, gross unrealized gain, gross unrealized loss and fair value of the Company's available-for-sale securities as of March 31, 2015 and December 31, 2014, respectively (in thousands):


		31-Mar-15										December 31, 2014
		Amortized Cost		Gross Unrealized Gain			Gross Unrealized Loss		Fair Value			Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	Available-for-sale securities:
	Convertible debt securities	$	2,030	$	727		$	—	$	2,757		$	2,030	$	497	$	—	$	2,527

	Redeemable preferred shares	4,599		301			—		4,900			4,599		311		—		4,910

	Total available-for-sale securities	$	6,629	$	1,028		$	—	$	7,657		$	6,629	$	808	$	—	$	7,437

Supplemental_Consolidated_Bala1

Supplemental Consolidated Balance Sheet and Statement of Operations Information (Tables)	3 Months Ended
	Mar. 31, 2015
SUPPLEMENTAL CONSOLIDATED BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION [Abstract]
Schedule of Other Income (Expense) [Table Text Block]	The following table summarizes the Company's other expense, net for the three months ended March 31, 2015 and 2014(in thousands):


			Three Months Ended March 31,
			2015				2014
	Interest income		$	227			$	376
	Interest income		$	227			$	376
	Interest expense		(670		)		(88		)
	Impairments of investments		—				(397		)
	Impairments of investments		—				(397		)
	Gain on equity method investments		—				52
	Gain on equity method investments		—				52
	Foreign exchange losses, net		(19,497		)		(747		)
	Other		13				(36		)
	Other		13				(36		)
	Other expense, net		$	(19,927	)		$	(840	)
Schedule of Prepaid Expenses and Other Current Assets [Table Text Block]	The following table summarizes the Company's prepaid expenses and other current assets as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Unamortized tax effects on intercompany transactions	$	8,168			$	14,170
	Unamortized tax effects on intercompany transactions	$	8,168			$	14,170
	Finished goods inventories	45,669				52,237
	Finished goods inventories	45,669				52,237
	Prepaid expenses	31,739				32,758
	Prepaid expenses	31,739				32,758
	Restricted cash	8,082				10,852
	Restricted cash	8,082				10,852
	Income taxes receivable	55,646				41,769
	Income taxes receivable	55,646				41,769
	VAT receivable	15,068				17,746
	VAT receivable	15,068				17,746
	Prepaid marketing	6,022				7,413
	Prepaid marketing	6,022				7,413
	Other	13,698				15,437
	Other	13,698				15,437
	Total prepaid expenses and other current assets	$	184,092			$	192,382
	Total prepaid expenses and other current assets	$	184,092			$	192,382
Schedule of Accrued Merchant and Supplier Payables [Table Text Block]	The following table summarizes the Company's accrued merchant and supplier payables as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Accrued merchant payables	$	501,126			$	499,317
	Accrued merchant payables	$	501,126			$	499,317
	Accrued supplier payables(1)	222,467				272,839
	Accrued supplier payables(1)	222,467				272,839
	Total accrued merchant and supplier payables	$	723,593			$	772,156
	Total accrued merchant and supplier payables	$	723,593			$	772,156

	-1	Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.
Schedule of Accrued Expenses [Table Text Block]	The following table summarizes the Company's accrued expenses as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Marketing	$	19,992			$	15,962
	Marketing	$	19,992			$	15,962
	Refunds reserve	30,498				32,535
	Refunds reserve	30,498				32,535
	Payroll and benefits	50,010				59,802
	Payroll and benefits	50,010				59,802
	Customer credits	32,794				42,729
	Customer credits	32,794				42,729
	Professional fees	13,814				14,254
	Professional fees	13,814				14,254
	Other	47,203				48,978
	Other	47,203				48,978
	Total accrued expenses	$	194,311			$	214,260
	Total accrued expenses	$	194,311			$	214,260
Schedule of Other Current Liabilities [Table Text Block]	The following table summarizes the Company's other current liabilities as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Income taxes payable	$	18,173			$	14,461
	Income taxes payable	$	18,173			$	14,461
	VAT payable	21,548				30,778
	VAT payable	21,548				30,778
	Sales taxes payable	5,456				9,042
	Sales taxes payable	5,456				9,042
	Deferred revenue	52,900				46,344
	Deferred revenue	52,900				46,344
	Capital lease obligations	14,499				14,872
	Capital lease obligations	14,499				14,872
	Other	12,667				11,624
	Other	12,667				11,624
	Total other current liabilities	$	125,243			$	127,121
	Total other current liabilities	$	125,243			$	127,121
Schedule of Other Liabilities, Noncurrent [Table Text Block]	The following table summarizes the Company's other non-current liabilities as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	Long-term tax liabilities	$	80,255			$	82,138
	Long-term tax liabilities	$	80,255			$	82,138
	Deferred rent	12,903				13,200
	Deferred rent	12,903				13,200
	Capital lease obligations	19,063				23,387
	Capital lease obligations	19,063				23,387
	Other	10,560				10,806
	Other	10,560				10,806
	Total other non-current liabilities	$	122,781			$	129,531
	Total other non-current liabilities	$	122,781			$	129,531
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table summarizes the components of accumulated other comprehensive income, net of tax, as of March 31, 2015 and December 31, 2014 (in thousands):


		Foreign currency translation adjustments				Unrealized gain (loss) on available-for-sale securities				Pension adjustments			Total
	Balance as of December 31, 2014	$	36,764			$	499			$	(1,500	)	$	35,763
	Balance as of December 31, 2014	$	36,764			$	499			$	(1,500	)	$	35,763
	Other comprehensive income	8,290				137				26			8,453
	Other comprehensive income	8,290				137				26			8,453
	Balance as of March 31, 2015	$	45,054			$	636			$	(1,474	)	$	44,216
	Balance as of March 31, 2015	$	45,054			$	636			$	(1,474	)	$	44,216

Stockholders_Equity_and_Compen1

Stockholders' Equity and Compensation Arrangements Share - Based Compensation Activity (Tables)	3 Months Ended
	Mar. 31, 2015
Share - Based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	The table below summarizes the stock option activity for the three months ended March 31, 2015:


			Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
								(in thousands) (1)
	Outstanding at December 31, 2014		2,262,994		$	1.09	5.03	$	16,226

	Exercised		(184,626	)	$	0.66

	Forfeited		(876	)	$	2.48

	Outstanding at March 31, 2015		2,077,492		$	1.13	4.8	$	12,631


	Exercisable at March 31, 2015		2,077,492		$	1.13	4.8	$	12,631


	-1	The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of March 31, 2015 and December 31, 2014, respectively.
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	The table below summarizes activity regarding unvested restricted stock units under the Plans for the three months ended March 31, 2015:


			Restricted Stock Units		Weighted- Average Grant Date Fair Value (per share)
	Unvested at December 31, 2014		41,337,927		$	7.78

	Granted		2,235,833		$	7.48

	Vested		(6,101,202	)	$	8.02

	Forfeited		(1,983,289	)	$	8.11

	Unvested at March 31, 2015		35,489,269		$	7.7

Schedule of Nonvested Performance-based Units Activity [Table Text Block]	The table below summarizes activity regarding unvested performance share units for the three months ended March 31, 2015:


			Performance Share Units		Weighted- Average Grant Date Fair Value (per share)
	Unvested at December 31, 2014		1,015,844		$	8.07

	Granted		—		$	—

	Vested		—		$	—

	Forfeited		(111,287	)	$	8.07

	Unvested at March 31, 2015		904,557		$	8.07

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	The table below summarizes activity regarding unvested restricted stock for the three months ended March 31, 2015:


			Restricted Stock Awards		Weighted- Average Grant Date Fair Value (per share)
	Unvested at December 31, 2014		34,067		$	15.53

	Granted		984,843		$	7.42

	Vested		(1,591	)	$	17.07

	Forfeited		—		$	—

	Unvested at March 31, 2015		1,017,319		$	7.56

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
FAIR VALUE MEASUREMENTS [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following tables summarize the Company's assets and liabilities that are measured at fair value on a recurring basis (in thousands):


						Fair Value Measurement at Reporting Date Using
	Description	31-Mar-15				Quoted Prices in Active Markets for				Significant Other			Significant
						Identical Assets				Observable			Unobservable
						(Level 1)				Inputs			Inputs
										(Level 2)			(Level 3)
	Assets:
	Cash equivalents	$	440,616			$	440,616			$	—		$	—

	Available-for-sale securities:
	Convertible debt securities	2,757				—				—			2,757

	Redeemable preferred shares	4,900				—				—			4,900


	Liabilities:
	Contingent consideration	1,373				—				—			1,373



						Fair Value Measurement at Reporting Date Using
	Description	31-Dec-14				Quoted Prices in Active Markets for				Significant Other			Significant
						Identical Assets				Observable			Unobservable
						(Level 1)				Inputs			Inputs
										(Level 2)			(Level 3)
	Assets:
	Cash equivalents	$	440,596			$	440,596			$	—		$	—

	Available-for-sale securities:
	Convertible debt securities	2,527				—				—			2,527

	Redeemable preferred shares	4,910				—				—			4,910


	Liabilities:
	Contingent consideration	1,983				—				—			1,983

Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs [Table Text Block]	The following table provides a roll-forward of the fair value of recurring Level 3 fair value measurements for the three months ended March 31, 2015 and 2014 (in thousands):


			Three Months Ended March 31,
			2015				2014
	Assets
	Available-for-sale securities
	Convertible debt securities:
	Beginning Balance		$	2,527			$	3,174

	Total gains (losses) included in other comprehensive income		230				(481		)

	Ending Balance		$	2,757			$	2,693

	Unrealized gains (losses) still held(1)		$	230			$	(481	)

	Redeemable preferred shares:
	Beginning Balance		$	4,910			$	—

	Purchase of redeemable preferred shares		—				4,599

	Total (losses) gains included in other comprehensive income		(10		)		—

	Ending Balance		$	4,900			$	4,599

	Unrealized (losses) gains still held(1)		$	(10	)		$	—


	Liabilities
	Contingent Consideration:
	Beginning Balance		$	1,983			$	606

	Settlements of contingent consideration liabilities		—				(424		)

	Reclass to non-fair value liabilities when no longer contingent		(331		)		(143		)
	Total gains included in earnings(2)		(279		)		(39		)
	Ending Balance		$	1,373			$	—

	Unrealized (gains) losses still held(1)		$	(279	)		$	—


	-1	Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

	-2	Changes in the fair value of contingent consideration liabilities are classified within "Acquisition-related expense (benefit), net" on the condensed consolidated statements of operations.
Fair Value of Financial Assets and Liabilities not Measured at Fair Value [Table Text Block]	The following table presents the carrying amounts and fair values of financial instruments that are not carried at fair value in the consolidated financial statements (in thousands):


			31-Mar-15								31-Dec-14
			Carrying Amount				Fair Value				Carrying Amount			Fair Value
	Cost method investments		$	14,082			$	14,316			$	15,630		$	16,134

Loss_Per_Share_of_Class_A_and_1

Loss Per Share of Class A and Class B Common Stock (Tables)	3 Months Ended
	Mar. 31, 2015
LOSS PER SHARE OF CLASS A AND CLASS B COMMON STOCK [Abstract] [Abstract]
Schedule of Earnings per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted net loss per share of Class A and Class B common stock for the three months ended March 31, 2015 and 2014 (in thousands, except share amounts and per share amounts):


			Three Months Ended March 31,
			2015							2014
			Class A				Class B			Class A			Class B
	Basic net loss per share:
	Numerator
	Allocation of net loss - continuing operations		$	(16,681	)		$	(58	)	$	(21,698	)	$	(76	)
	Less: Allocation of net income attributable to noncontrolling interests		3,804				14			2,423			9

	Allocation of net loss attributable to common stockholders - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Allocation of net income (loss) attributable to common stockholders - discontinued operations		6,261				23			(13,541		)	(48		)

	Allocation of net loss attributable to common stockholders		$	(14,224	)		$	(49	)	$	(37,662	)	$	(133	)
	Denominator
	Weighted-average common shares outstanding		673,982,961				2,399,976			679,978,714			2,399,976

	Basic net income (loss) per share:
	Continuing operations		$	(0.03	)		$	(0.03	)	$	(0.04	)	$	(0.04	)
	Discontinued operations		0.01				0.01			(0.02		)	(0.02		)

	Basic net loss per share		$	(0.02	)		$	(0.02	)	$	(0.06	)	$	(0.06	)

	Diluted net loss per share:
	Numerator
	Allocation of net loss attributable to common stockholders for basic computation - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Reallocation of net income (loss) attributable to common stockholders as a result of conversion of Class B(1)		—				—			—			—

	Allocation of net loss attributable to common stockholders - continuing operations		$	(20,485	)		$	(72	)	$	(24,121	)	$	(85	)
	Allocation of net income (loss) attributable to common stockholders for basic computation - discontinued operations		$	6,261			$	23		$	(13,541	)	$	(48	)

	Reallocation of net income (loss) attributable to common stockholders as a result of conversion of Class B(1)		—				—			—			—

	Allocation of net loss attributable to common stockholders - discontinued operations		6,261				23			(13,541		)	(48		)

	Allocation of net loss attributable to common stockholders		$	(14,224	)		$	(49	)	$	(37,662	)	$	(133	)
	Denominator
	Weighted-average common shares outstanding used in basic computation		673,982,961				2,399,976			679,978,714			2,399,976

	Conversion of Class B(1)		—				—			—			—

	Employee stock options(1)		—				—			—			—

	Restricted shares and RSUs(1)		—				—			—			—

	Weighted-average diluted shares outstanding(1)		673,982,961				2,399,976			679,978,714			2,399,976

	Diluted net income (loss) per share:
	Continuing operations		$	(0.03	)		$	(0.03	)	$	(0.04	)	$	(0.04	)
	Discontinued operations		0.01				0.01			(0.02		)	(0.02		)

	Diluted net loss per share		$	(0.02	)		$	(0.02	)	$	(0.06	)	$	(0.06	)

	-1	Conversion of Class B shares into Class A shares and outstanding equity awards have not been reflected in the diluted net loss per share calculation for the three months ended March 31, 2015 and 2014 because the effect would be antidilutive.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	The following weighted-average outstanding equity awards are not included in the diluted loss per share calculation above because they would have had an antidilutive effect:


			Three Months Ended March 31,
			2015			2014
	Stock options		2,135,535			3,233,467

	Restricted stock units		38,057,394			40,166,021

	Restricted stock		580,796			77,008

	ESPP shares		621,237			422,873

	Total		41,394,962			43,899,369

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
Segment Information (Tables)	Mar. 31, 2015
SEGMENT INFORMATION [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Revenue and profit or loss information by reportable segment reconciled to consolidated net loss for the three months ended March 31, 2015 and 2014 were as follows (in thousands):



			Three Months Ended March 31,
			2015				2014
	North America
	Revenue(1)		$	479,882			$	431,062
	Revenue(1)		$	479,882			$	431,062
	Segment cost of revenue and operating expenses(2)		455,216				419,677
	Segment cost of revenue and operating expenses(2)		455,216				419,677
	Segment operating income(2)		24,666				11,385
	Segment operating income(2)		24,666				11,385
	EMEA
	Revenue(1)		216,220				230,893
	Revenue(1)		216,220				230,893
	Segment cost of revenue and operating expenses(2)		196,568				211,970
	Segment cost of revenue and operating expenses(2)		196,568				211,970
	Segment operating income(2)		19,652				18,923
	Segment operating income(2)		19,652				18,923
	Rest of World
	Revenue		54,254				66,460
	Revenue		54,254				66,460
	Segment cost of revenue and operating expenses(2)		58,402				78,436
	Segment cost of revenue and operating expenses(2)		58,402				78,436
	Segment operating loss(2)		(4,148		)		(11,976		)
	Consolidated
	Revenue		750,356				728,415
	Revenue		750,356				728,415
	Segment cost of revenue and operating expenses(2)		710,186				710,083
	Segment cost of revenue and operating expenses(2)		710,186				710,083
	Segment operating income(2)		40,170				18,332
	Segment operating income(2)		40,170				18,332
	Stock-based compensation		35,144				22,911
	Stock-based compensation		35,144				22,911
	Acquisition-related (benefit) expense, net		(269		)		1,785
	Acquisition-related (benefit) expense, net		(269		)		1,785
	Income (loss) from operations		5,295				(6,364		)
	Income (loss) from operations		5,295				(6,364		)
	Other expense, net		(19,927		)		(840		)
	Loss from continuing operations before provision for income taxes		(14,632		)		(7,204		)
	Provision for income taxes		2,107				14,570
	Provision for income taxes		2,107				14,570
	Loss from continuing operations		(16,739		)		(21,774		)
	Income (loss) from discontinued operations, net of tax		6,284				(13,589		)
	Income (loss) from discontinued operations, net of tax		6,284				(13,589		)
	Net loss		$	(10,455	)		$	(35,363	)

	-1	North America includes revenue from the United States of $473.1 million and $419.9 million for the three months ended March 31, 2015 and 2014, respectively. EMEA includes revenue from Switzerland of $117.5 million and $91.9 million for the three months ended March 31, 2015 and 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three months ended March 31, 2015 and 2014.

	-2	Segment cost of revenue and operating expenses and segment operating income (loss) exclude stock-based compensation and acquisition-related (benefit) expense, net. This presentation corresponds to the measure of segment profit or loss that the Company's chief operating decision-maker uses in assessing segment performance and making resource allocation decisions. The following table summarizes the Company's stock-based compensation expense and acquisition-related expense (benefit), net by reportable segment for the three months ended March 31, 2015 and 2014 (in thousands):


			Three Months Ended March 31,
			2015								2014
			Stock-based compensation				Acquisition-related				Stock-based compensation			Acquisition-related
	North America		$	31,252			$	(269	)		$	19,479		$	1,641
	North America		$	31,252			$	(269	)		$	19,479		$	1,641
	EMEA		2,647								2,273			144
	EMEA		2,647								2,273			144
	Rest of World		1,245				—				1,159			—
	Rest of World		1,245				—				1,159			—
	Consolidated		$	35,144			$	(269	)		$	22,911		$	1,785
	Consolidated		$	35,144			$	(269	)		$	22,911		$	1,785
Acquisition-related expense (benefit), net for the North America segment includes external transaction costs and gains and losses relating to contingent consideration obligations incurred by U.S. legal entities relating to purchases of businesses that became part of the EMEA and Rest of World segments, which is consistent with the attribution used for internal reporting purposes.
Stock Based Compensation and Acquisition Related by Segment [Table Text Block]	The following table summarizes the Company's stock-based compensation expense and acquisition-related expense (benefit), net by reportable segment for the three months ended March 31, 2015 and 2014 (in thousands):


			Three Months Ended March 31,
			2015								2014
			Stock-based compensation				Acquisition-related				Stock-based compensation			Acquisition-related
	North America		$	31,252			$	(269	)		$	19,479		$	1,641
	North America		$	31,252			$	(269	)		$	19,479		$	1,641
	EMEA		2,647								2,273			144
	EMEA		2,647								2,273			144
	Rest of World		1,245				—				1,159			—
	Rest of World		1,245				—				1,159			—
	Consolidated		$	35,144			$	(269	)		$	22,911		$	1,785
	Consolidated		$	35,144			$	(269	)		$	22,911		$	1,785
	Acquisition-related expense (benefit), net for the North America segment includes external transaction costs and gains and losses relating to contingent consideration obligations incurred by U.S. legal entities relating to purchases of businesses that became part of the EMEA and Rest of World segments, which is consistent with the attribution used for internal reporting purposes.
Schedule of Segment Assets [Table Text Block]	The following table summarizes the Company's total assets by reportable segment as of March 31, 2015 and December 31, 2014 (in thousands):


		31-Mar-15				31-Dec-14
	North America (1)	$	1,125,623			$	1,150,417
	North America (1)	$	1,125,623			$	1,150,417
	EMEA	506,295				552,486
	EMEA	506,295				552,486
	Rest of World	160,002				138,144
	Rest of World	160,002				138,144
	Assets held for sale (1)	362,731				386,550
	Assets held for sale (1)	362,731				386,550
	Consolidated total assets	$	2,154,651			$	2,227,597
	Consolidated total assets	$	2,154,651			$	2,227,597

	-1	North America contains assets from the United States of $1,122.9 million and $1,120.4 million as of March 31, 2015 and December 31, 2014, respectively. Assets held for sale contains assets from the Republic of Korea of $362.7 million and $386.6 million as of March 31, 2015 and December 31, 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total assets as of March 31, 2015 and
Third Party and Other and Direct Revenue [Table Text Block]	The following table summarizes the Company's third party and other and direct revenue from continuing operations by category for its three reportable segments for the three months ended March 31, 2015 and 2014 (in thousands):


		North America								EMEA						Rest of World					Consolidated
		Three Months Ended								Three Months Ended						Three Months Ended					Three Months Ended
		March 31,								March 31,						March 31,					March 31,
		2015				2014				2015			2014			2015		2014			2015		2014
	Local (1):
	Third party and other	$	180,864			$	177,247			$	82,536		$	109,120		$	30,281	$	38,932		$	293,681	$	325,299
	Third party and other	$	180,864			$	177,247			$	82,536		$	109,120		$	30,281	$	38,932		$	293,681	$	325,299

	Goods:
	Third party	648				1,321				11,978			17,475			12,613		15,443			25,239		34,239
	Third party	648				1,321				11,978			17,475			12,613		15,443			25,239		34,239
	Direct	278,381				236,114				106,989			89,414			4,865		5,185			390,235		330,713
	Direct	278,381				236,114				106,989			89,414			4,865		5,185			390,235		330,713
	Total	279,029				237,435				118,967			106,889			17,478		20,628			415,474		364,952
	Total	279,029				237,435				118,967			106,889			17,478		20,628			415,474		364,952

	Travel:
	Third party	19,989				16,380				14,717			14,884			6,495		6,900			41,201		38,164
	Third party	19,989				16,380				14,717			14,884			6,495		6,900			41,201		38,164

	Total revenue	$	479,882			$	431,062			$	216,220		$	230,893		$	54,254	$	66,460		$	750,356	$	728,415
	Total revenue	$	479,882			$	431,062			$	216,220		$	230,893		$	54,254	$	66,460		$	750,356	$	728,415

	-1	Includes revenue from deals with local and national merchants and through local events.
Gross Profit by Category [Table Text Block]	The following table summarizes the Company's gross profit from continuing operations by category for its three reportable segments for the three months ended March 31, 2015 and 2014 (in thousands):


		North America								EMEA						Rest of World					Consolidated
		Three Months Ended								Three Months Ended						Three Months Ended					Three Months Ended
		March 31,								March 31,						March 31,					March 31,
		2015				2014				2015			2014			2015		2014			2015		2014
	Local (1):
	Third party and other	$	154,776			$	152,622			$	77,356		$	100,066		$	26,161	$	31,798		$	258,293	$	284,486
	Third party and other	$	154,776			$	152,622			$	77,356		$	100,066		$	26,161	$	31,798		$	258,293	$	284,486

	Goods:
	Third party	434				1,160				10,193			15,722			6,407		8,776			17,034		25,658
	Third party	434				1,160				10,193			15,722			6,407		8,776			17,034		25,658
	Direct	23,489				11,444				15,288			11,580			205		(1,412		)	38,982		21,612
	Direct	23,489				11,444				15,288			11,580			205		(1,412		)	38,982		21,612
	Total	23,923				12,604				25,481			27,302			6,612		7,364			56,016		47,270
	Total	23,923				12,604				25,481			27,302			6,612		7,364			56,016		47,270

	Travel:
	Third party	15,791				14,442				12,400			13,669			4,906		5,645			33,097		33,756
	Third party	15,791				14,442				12,400			13,669			4,906		5,645			33,097		33,756

	Total gross profit	$	194,490			$	179,668			$	115,237		$	141,037		$	37,679	$	44,807		$	347,406	$	365,512
	Total gross profit	$	194,490			$	179,668			$	115,237		$	141,037		$	37,679	$	44,807		$	347,406	$	365,512

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

Description_of_Business_and_Ba2

Description of Business and Basis of Presentation Business Combination (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$259
Cash Payments to Acquire Businesses	96.5
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$162.90

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended
Discontinued Operations (Details) (USD $)	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	$360,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Third party and other revenue	360,121,000		397,702,000
Direct revenue	390,235,000		330,713,000
Third party and other cost of revenue	51,697,000		53,802,000
Direct cost of revenue	351,253,000		309,101,000
Marketing expense	52,533,000		69,185,000
Selling, general and administrative expense	289,847,000		300,906,000
Other income, net	-19,927,000		-840,000
Loss from discontinued operations before provision for income taxes	-20,492,000		-13,589,000
Benefit from income taxes	26,776,000		0
Income (loss) from discontinued operations, net of tax	6,284,000		-13,589,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Cash and cash equivalents	29,557,000			55,279,000
Accounts receivable, net	25,703,000			14,557,000
Deferred income taxes	502,000			512,000
Property, equipment and software, net	6,313,000			6,471,000
Goodwill	206,980,000			211,054,000
Intangible assets, net	72,185,000			79,948,000
Other assets	21,491,000			18,729,000
Assets classified as held for sale	362,731,000	[1]		386,550,000	[1]
Accounts payable	6,930,000			8,033,000
Accrued merchant and supplier payables	140,142,000			138,411,000
Accrued expenses	14,490,000			16,092,000
Deferred income taxes	502,000			512,000
Other liabilities	10,311,000			9,944,000
Liabilities classified as held for sale	172,375,000			172,992,000
Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Third party and other revenue	17,883,000		28,727,000
Direct revenue	24,823,000		495,000
Third party and other cost of revenue	-9,524,000		-8,549,000
Direct cost of revenue	-25,949,000		-464,000
Marketing expense	-5,023,000		-9,739,000
Selling, general and administrative expense	-22,763,000		-24,059,000
Other income, net	61,000		0
Groupon, Inc. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	$285,000,000

[1]	(1)North America contains assets from the United States of $1,122.9 million and $1,120.4 million as of March 31, 2015 and December 31, 2014, respectively. Assets held for sale contains assets from the Republic of Korea of $362.7 million and $386.6 million as of March 31, 2015 and December 31, 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total assets as of March 31, 2015 and December 31, 2014

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets Goodwill Activity by Segment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning of period	$236,756
Goodwill, related to acquisitions	152
Foreign currency translation	-12,223
Goodwill, end of period	224,685
North America [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	116,718
Goodwill, related to acquisitions	152
Foreign currency translation	-1
Goodwill, end of period	116,869
EMEA [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	102,179
Goodwill, related to acquisitions	0
Foreign currency translation	-10,882
Goodwill, end of period	91,297
ROW [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	17,859
Goodwill, related to acquisitions	0
Foreign currency translation	-1,340
Goodwill, end of period	$16,519

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets Other Intangible Assets (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	$112,354	$117,789
Accumulated Amortization, Intangible Assets	87,500	87,180
Net Carrying Value, Intangible Assets	24,854	30,609
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	45,285	48,810
Accumulated Amortization, Intangible Assets	38,180	37,744
Net Carrying Value, Intangible Assets	7,105	11,066
Merchant relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	7,695	8,386
Accumulated Amortization, Intangible Assets	7,639	8,323
Net Carrying Value, Intangible Assets	56	63
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	10,043	10,532
Accumulated Amortization, Intangible Assets	6,568	6,935
Net Carrying Value, Intangible Assets	3,475	3,597
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	24,659	25,352
Accumulated Amortization, Intangible Assets	21,541	21,713
Net Carrying Value, Intangible Assets	3,118	3,639
Brand Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	7,960	7,664
Accumulated Amortization, Intangible Assets	1,879	1,486
Net Carrying Value, Intangible Assets	6,081	6,178
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value, Intangible Assets	16,712	17,045
Accumulated Amortization, Intangible Assets	11,693	10,979
Net Carrying Value, Intangible Assets	$5,019	$6,066

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets Estimated Future Amortization Expense (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$5,934	$5,985
Finite-Lived Intangible Assets, Net, Amortization Expense [Abstract]
Remaining amounts in 2015	10,010
2016	8,204
2017	3,584
2018	2,912
2019	144
Thereafter	0
Total	$24,854
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year 0 months 0 days
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years 0 months 0 days

Investments_Investments_Table_

Investments Investments Table (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Cost and Equity Method Investments [Line Items]
Cost method investments	$14,082	$15,630
Equity method investments	1,231	1,231
Total cost and equity method investments	15,313	16,861
Available-for-sale securities	7,657	7,437
Total investments	22,970	24,298
Maximum [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Equity Method Investments, Ownership Percentage	50.00%	50.00%
Available-for-Sale Securities, Ownership Percentage	19.00%	19.00%
Minimum [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Equity Method Investments, Ownership Percentage	21.00%	21.00%
Available-for-Sale Securities, Ownership Percentage	17.00%	17.00%
Cost-method Investments [Member] \| Maximum [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Cost Method Investments, Ownership Percentage	19.00%	19.00%
Cost-method Investments [Member] \| Minimum [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Cost Method Investments, Ownership Percentage	6.00%	6.00%
Convertible debt securities [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Available-for-sale securities	2,757	2,527
Redeemable preferred shares [Member]
Schedule of Cost and Equity Method Investments [Line Items]
Available-for-sale securities	$4,900	$4,910

Investments_Availableforsale_S

Investments Available-for-sale Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$6,629	$6,629
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	1,028	808
Available-for-sale securities	7,657	7,437
Convertible debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,030	2,030
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	727	497
Available-for-sale securities	2,757	2,527
Redeemable preferred shares [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,599	4,599
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	301	311
Available-for-sale securities	$4,900	$4,910

Supplemental_Consolidated_Bala2

Supplemental Consolidated Balance Sheet and Statement of Operations Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Interest and Other Income [Abstract]
Interest income	$227		$376
Interest expense	-670		-88
Impairments of investments	0		-397
Gain on equity method investments	0		52
Foreign exchange losses, net	-19,497		-747
Other	13		-36
Other expense, net	-19,927		-840
Prepaid Expense and Other Assets, Current [Abstract]
Current portion of unamortized tax effects on intercompany transactions	8,168			14,170
Finished goods inventories	45,669			52,237
Prepaid expenses	31,739			32,758
Restricted cash	8,082			10,852
Income taxes receivable	55,646			41,769
VAT receivable	15,068			17,746
Prepaid marketing	6,022			7,413
Other	13,698			15,437
Total prepaid expenses and other current assets	184,092			192,382
Merchant and Supplier Payables [Abstract]
Accrued merchant payables	501,126			499,317
Accrued supplier payables	222,467	[1]		272,839	[1]
Total accrued merchant and supplier payables	723,593			772,156
Accrued Expenses [Abstract]
Marketing	19,992			15,962
Refunds reserve	30,498			32,535
Payroll and benefits	50,010			59,802
Customer credits	32,794			42,729
Professional fees	13,814			14,254
Other	47,203			48,978
Total accrued expenses	194,311			214,260
Current liabilities [Abstract]:
Income taxes payable	18,173			14,461
VAT payable	21,548			30,778
Sales taxes payable	5,456			9,042
Deferred revenue	52,900			46,344
Capital lease obligations	14,499			14,872
Other	12,667			11,624
Total other current liabilities	125,243			127,121
Liabilities, Noncurrent [Abstract]
Long-term tax liabilities	80,255			82,138
Deferred rent	12,903			13,200
Capital lease obligations	19,063			23,387
Other	10,560			10,806
Total other non-current liabilities	122,781			129,531
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments, beginning of period	36,764
Unrealized loss on available-for-sale securities, net of tax, beginning of period	499
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax, beginning of period	-1,500
Accumulated other comprehensive income, beginning of period	35,763
Foreign currency translation adjustments	10,707		-1,224
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	26		0
Foreign currency translation adjustments, end of period	45,054
Unrealized loss on available-for-sale securities, net of tax, end of period	636
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax, end of period	-1,474
Accumulated other comprehensive income, end of period	44,216
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	8,290
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gain (loss) on available-for-sale debt security, net of tax	137
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	26
Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	8,290
Unrealized gain (loss) on available-for-sale debt security, net of tax	137
Other comprehensive income	$8,453

[1]	(1)Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.

Commitments_and_Contingencies_

Commitments and Contingencies Legal Matters (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Mar. 31, 2015
COMMITMENTS AND CONTINGENCIES [Abstract]
Restatement of Prior Year Revenue	$14,300,000
Restatement of Prior Year Operating Income	30,000,000
Restatement of Prior Year Income, Net of Tax	22,600,000
Impact of Restatement on Earnings Per Share, Basic	$0.04
Litigation Settlement, Expense		8,500,000
Loss Contingency, Range of Possible Loss, Maximum			$41,700,000

Stockholders_Equity_and_Compen2

Stockholders' Equity and Compensation Arrangements Initial Public Offering, Convertible Preferred Stock and Common Stock (Details)	12 Months Ended
	Dec. 31, 2012
	NumberofClasses
Classes of common stock, number	3

Stockholders_Equity_and_Compen3

Stockholders' Equity and Compensation Arrangements Repurchase Program (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Employee Stock Purchase Plan [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$82,999
Common Class A [Member]
Employee Stock Purchase Plan [Line Items]
Stock Repurchase Program, Authorized Amount	300,000		300,000
Stock Repurchased During Period, Shares	2,417,700	3,075,700
Stock Repurchased During Period, Value	$18,534	$29,500

Stockholders_Equity_and_Compen4

Stockholders' Equity and Compensation Arrangements Groupon, Inc. Stock Plans (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	44,799,386
Stock-based compensation	$35,144	$22,911
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount	3,088	2,300
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	220,805
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 3 months 4 days
Employee Stock Purchase Plan, shares authorized	10,000,000
Employee Stock Purchase Plan, issued shares	328,644	333,824
Continuing Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	35,144	22,911
Discontinued Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$1,100	$800

Stockholders_Equity_and_Compen5

Stockholders' Equity and Compensation Arrangements Stock Option Activity (Details) (Employee Stock Option [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Employee Stock Option [Member]
Options [Abstract]
Outstanding stock options	2,262,994
Exercise of stock options, shares	-184,626
Forfeited stock options	-876
Outstanding stock options	2,077,492	2,262,994
Exercisable stock options	2,077,492
Weighted average number of shares outstanding
Weighted Average Exercise Price Outstanding Stock Options	$1.09
Weighted Average Exercise Price, Exercised Options	$0.66
Weighted Average Exercise Price, Forfeited Options	$2.48
Weighted Average Exercise Price Outstanding Stock Options	$1.13	$1.09
Weighted Average Exercise Price, Exercisable Options	$1.13
Weighted Average Remaining Contractual Term [Abstract]
Weighted Average Remaining Contractual Term	4 years 9 months 18 days	5 years 0 months 10 days
Weighted Average Remaining Contractual Term	4 years 9 months 18 days	5 years 0 months 10 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 9 months 18 days
Aggregate Intrinsic Value [Abstract]
Average Intrinsic Value, Outstanding	$16,226
Average Intrinsic Value, Outstanding	12,631	16,226
Average Intrinsic Value, Exercisable	$12,631

Stockholders_Equity_and_Compen6

Stockholders' Equity and Compensation Arrangements Restricted Stock Units (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights	0.25
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	41,337,927
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,235,833
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	-6,101,202
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	-1,983,289
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	35,489,269
Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	7.78
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	7.48
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	8.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	8.11
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	7.7

Stockholders_Equity_and_Compen7

Stockholders' Equity and Compensation Arrangements Performance Share Units (Details) (Performance Shares [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Share Units, Shares Granted		2,000,000
Compensation Arrangement Performance Share Units [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,015,844
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	-111,287
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	904,557	1,015,844
Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$8.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$0	$8.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$8.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$8.07	$8.07

Stockholders_Equity_and_Compen8

Stockholders' Equity and Compensation Arrangements Restricted Stock Awards (Details) (Restricted Stock [Member], USD $)	3 Months Ended
	Mar. 31, 2015
Restricted Stock [Member]
Restricted Stock Award [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	34,067
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	984,843
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	-1,591
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,017,319
Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$15.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$7.42
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$17.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$7.56

Income_Taxes_Text_Details

Income Taxes Text (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Provision for income taxes	$2,107	$14,570
Loss from continuing operations before provision for income taxes	-14,632	-7,204
Effective Income Tax Rate Reconciliation, Percent	-14.40%	-202.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Potential Change in Unrecognized Tax Benefits	19,000
Current portion of unamortized tax effects on intercompany transactions	8,168		14,170
Prepaid Expenses and Other Current Assets [Member]
Current portion of unamortized tax effects on intercompany transactions	8,200		14,170
Future amortization through 2015 [Member]
Current portion of unamortized tax effects on intercompany transactions	$8,200

Fair_Value_Measurements_Contin

Fair Value Measurements Contingent Obligations (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Minimum share price required to prevent contigent obligation	$6.48
Other Acquisition 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	$1,100
Other Acquisitions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	$8,090

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value, Assets and Liabilities Measured at Fair Value (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$7,657	$7,437
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	440,616	440,596
Contingent Consideration, Fair Value Disclosure	1,373	1,983
Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	440,616	440,596
Contingent Consideration, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Contingent Consideration, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Contingent Consideration, Fair Value Disclosure	1,373	1,983
Convertible debt securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,757	2,527
Convertible debt securities [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Convertible debt securities [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Convertible debt securities [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,757	2,527
Redeemable preferred shares [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,900	4,910
Redeemable preferred shares [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Redeemable preferred shares [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Redeemable preferred shares [Member] \| Fair Value, Measurements, Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$4,900	$4,910

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value, Reconciliation of Level 3 - Assets (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Convertible debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
AFS Securities, Beginning Asset Value	$2,527		$3,174
AFS Debt Security, (losses) included in OCI	230		-481
AFS Securities, Ending Asset Value	2,757		2,693
Unrealized Gains (Losses) Still Held - Assets	230	[1]	-481	[1]
Redeemable preferred shares [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
AFS Securities, Beginning Asset Value	4,910		0
AFS Debt Security, (losses) included in OCI	-10
AFS Securities, Ending Asset Value	4,900		4,599
Purchase of redeemable preferred shares	0		4,599
Unrealized Gains (Losses) Still Held - Assets	($10)	[1]	$0	[1]

[1]	Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

Fair_Value_Measurements_Fair_V2

Fair Value Measurements Fair Value, Reconciliation of Level 3 - Liabilities (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent Consideration, Beginning Value	$1,983		$606
Contingent Consideration, Settlements	0		-424
Contingent Consideration, Reclass	-331		-143
(Gain) loss, net from changes in fair value of contingent consideration	-279		-39
Contingent Consideration, Ending Value	1,373		0
Contingent Consideration, Unrealized Gain Loss	($279)	[1]	$0	[1]

[1]	Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

Fair_Value_Measurements_Financ

Fair Value Measurements Financial Assets and Liabilities, Not Measured at Fair Value (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
FAIR VALUE MEASUREMENTS [Abstract]
Cost method investments	$14,082	$15,630
Cost Method Investments, Fair Value Disclosure	$14,316	$16,134

Loss_Per_Share_of_Class_A_and_2

Loss Per Share of Class A and Class B Common Stock Basic and Diluted Earnings Per Share (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Basic net income (loss) per share
Allocation of net loss - continuing operations	($16,739,000)		($21,774,000)
Less: Allocation of net income attributable to noncontrolling interests	3,818,000		2,432,000
Net loss from discontinued operations	6,284,000		-13,589,000
Net loss attributable to Groupon, Inc.	-14,273,000		-37,795,000
Basic, weighted average number of shares outstanding	676,382,937		682,378,690
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Basic, net (loss) earnings per share	($0.02)		($0.06)
Diluted net income (loss) per share
Basic, weighted average number of shares outstanding	676,382,937		682,378,690
Diluted, weighted average number of shares outstanding	676,382,937		682,378,690
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Diluted, net (loss) earnings per share	($0.02)		($0.06)
Common Class A [Member]
Basic net income (loss) per share
Allocation of net loss - continuing operations	-16,681,000		-21,698,000
Less: Allocation of net income attributable to noncontrolling interests	3,804,000		2,423,000
Allocation of net loss attributable to common stockholders - continuing operations	-20,485,000		-24,121,000
Net loss from discontinued operations	6,261,000		-13,541,000
Net loss attributable to Groupon, Inc.	-14,224,000		-37,662,000
Basic, weighted average number of shares outstanding	673,982,961		679,978,714
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Basic, net (loss) earnings per share	($0.02)		($0.06)
Diluted net income (loss) per share
Allocation of net income attributable to common stockholders	-14,224,000		-37,662,000
Basic, weighted average number of shares outstanding	673,982,961		679,978,714
Conversion of Class B	0	[1]	0	[1]
Employee stock options	0	[1]	0	[1]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	0	[1]	0	[1]
Diluted, weighted average number of shares outstanding	673,982,961	[1]	679,978,714	[1]
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Diluted, net (loss) earnings per share	($0.02)		($0.06)
Common Class B [Member]
Basic net income (loss) per share
Allocation of net loss - continuing operations	-58,000		-76,000
Less: Allocation of net income attributable to noncontrolling interests	14,000		9,000
Allocation of net loss attributable to common stockholders - continuing operations	-72,000		-85,000
Net loss from discontinued operations	23,000		-48,000
Net loss attributable to Groupon, Inc.	-49,000		-133,000
Basic, weighted average number of shares outstanding	2,399,976		2,399,976
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Basic, net (loss) earnings per share	($0.02)		($0.06)
Diluted net income (loss) per share
Allocation of net income attributable to common stockholders	-49,000		-133,000
Basic, weighted average number of shares outstanding	2,399,976		2,399,976
Conversion of Class B	0	[1]	0	[1]
Employee stock options	0	[1]	0	[1]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	0	[1]	0	[1]
Diluted, weighted average number of shares outstanding	2,399,976	[1]	2,399,976	[1]
Continuing operations	($0.03)		($0.04)
Discontinued operations	$0.01		($0.02)
Diluted, net (loss) earnings per share	($0.02)		($0.06)
Continuing Operations [Member] \| Common Class A [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation	-20,485,000		-24,121,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	0	[1]	0	[1]
Allocation of net income attributable to common stockholders	-20,485,000		-24,121,000
Continuing Operations [Member] \| Common Class B [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation	-72,000		-85,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	0	[1]	0	[1]
Allocation of net income attributable to common stockholders	-72,000		-85,000
Discontinued Operations [Member] \| Common Class A [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation	6,261,000		-13,541,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	0	[1]	0	[1]
Allocation of net income attributable to common stockholders	6,261,000		-13,541,000
Discontinued Operations [Member] \| Common Class B [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation	23,000		-48,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	0	[1]	0	[1]
Allocation of net income attributable to common stockholders	$23,000		($48,000)

[1]	Conversion of Class B shares into Class A shares and outstanding equity awards have not been reflected in the diluted net loss per share calculation for the three months ended MarchB 31, 2015 and 2014 because the effect would be antidilutive.

Loss_Per_Share_of_Class_A_and_3

Loss Per Share of Class A and Class B Common Stock Schedule of Equity Antidilutive Securities (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	41,394,962	43,899,369
Performance share units	909,142	132,215
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	2,135,535	3,233,467
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	38,057,394	40,166,021
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	580,796	77,008
Employee Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	621,237	422,873

Segment_Information_Segment_In

Segment Information Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Segment Reporting Information [Line Items]
Number of Reportable Segments	3
Revenue	$750,356		$728,415
Segment cost of revenue and operating expenses	710,186	[1]	710,083	[1]
Segment operating income (loss)	40,170	[1]	18,332	[1]
Stock-based compensation	35,144		22,911
Acquisition-related (benefit) expense, net	-269		1,785
Income (loss) from operations	5,295		-6,364
Other expense, net	-19,927		-840
Loss from continuing operations before provision for income taxes	-14,632		-7,204
Provision for income taxes	2,107		14,570
Net loss from continuing operations	-16,739		-21,774
Net loss from discontinued operations	6,284		-13,589
Net loss	-10,455		-35,363
United States
Segment Reporting Information [Line Items]
Revenue	473,100		419,900
Switzerland
Segment Reporting Information [Line Items]
Revenue	117,500		91,900
North America [Member]
Segment Reporting Information [Line Items]
Revenue	479,882	[2]	431,062	[2]
Segment cost of revenue and operating expenses	455,216	[1]	419,677	[1]
Segment operating income (loss)	24,666	[1]	11,385	[1]
Stock-based compensation	31,252		19,479
Acquisition-related (benefit) expense, net	-269		1,641
EMEA [Member]
Segment Reporting Information [Line Items]
Revenue	216,220		230,893
Segment cost of revenue and operating expenses	196,568	[1]	211,970	[1]
Segment operating income (loss)	19,652	[1]	18,923	[1]
Stock-based compensation	2,647		2,273
Acquisition-related (benefit) expense, net			144
ROW [Member]
Segment Reporting Information [Line Items]
Revenue	54,254		66,460
Segment cost of revenue and operating expenses	58,402	[1]	78,436	[1]
Segment operating income (loss)	-4,148	[1]	-11,976	[1]
Stock-based compensation	1,245		1,159
Acquisition-related (benefit) expense, net	$0		$0
Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Concentration of risk, percentage	10.00%

[1]	Segment cost of revenue and operating expenses and segment operating income (loss) exclude stock-based compensation and acquisition-related (benefit) expense, net. This presentation corresponds to the measure of segment profit or loss that the Company's chief operating decision-maker uses in assessing segment performance and making resource allocation decisions. The following table summarizes the Company's stock-based compensation expense and acquisition-related expense (benefit), net by reportable segment for the three months ended MarchB 31, 2015 and 2014 (in thousands): Three Months Ended March 31, 2015B 2014 Stock-based compensationB Acquisition-relatedB Stock-based compensationB Acquisition-relatedNorth AmericaB $31,252B $(269)B $19,479B $1,641EMEAB 2,647 2,273B 144Rest of WorldB 1,245B bB 1,159B bConsolidatedB $35,144B $(269)B $22,911B $1,785Acquisition-related expense (benefit), net for the North America segment includes external transaction costs and gains and losses relating to contingent consideration obligations incurred by U.S. legal entities relating to purchases of businesses that became part of the EMEA and Rest of World segments, which is consistent with the attribution used for internal reporting purposes.
[2]	North America includes revenue from the United States of $473.1 million and $419.9 million for the three months ended MarchB 31, 2015 and 2014, respectively. EMEA includes revenue from Switzerland of $117.5 million and $91.9 million for the three months ended MarchB 31, 2015 and 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three months ended MarchB 31, 2015 and 2014.

Segment_Information_Total_Asse

Segment Information Total Assets (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets, Continuing Operations	2,154,651		$2,227,597
Disposal Group, Including Discontinued Operation, Assets	362,731	[1]	386,550	[1]
North America [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	1,125,623	[1]	1,150,417	[1]
EMEA [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	506,295		552,486
ROW [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	160,002		138,144
United States
Segment Reporting Information [Line Items]
Assets, Continuing Operations	1,122,900		1,120,400
Korea [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	362,700		$386,600
Assets, Total [Member]
Segment Reporting Information [Line Items]
Concentration of risk, percentage	10.00%

[1]	(1)North America contains assets from the United States of $1,122.9 million and $1,120.4 million as of March 31, 2015 and December 31, 2014, respectively. Assets held for sale contains assets from the Republic of Korea of $362.7 million and $386.6 million as of March 31, 2015 and December 31, 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total assets as of March 31, 2015 and December 31, 2014

Segment_Information_Revenue_by

Segment Information Revenue by Segment and Category (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Primary Categories	3
Third party and other	$360,121		$397,702
Direct	390,235		330,713
Total revenue	750,356		728,415
North America [Member]
Total revenue	479,882	[1]	431,062	[1]
EMEA [Member]
Total revenue	216,220		230,893
ROW [Member]
Total revenue	54,254		66,460
Local [Member]
Third party and other	293,681	[2]	325,299	[2]
Local [Member] \| North America [Member]
Third party and other	180,864	[2]	177,247	[2]
Local [Member] \| EMEA [Member]
Third party and other	82,536	[2]	109,120	[2]
Local [Member] \| ROW [Member]
Third party and other	30,281	[2]	38,932	[2]
Goods [Member]
Third party and other	25,239		34,239
Direct	390,235		330,713
Total revenue	415,474		364,952
Goods [Member] \| North America [Member]
Third party and other	648		1,321
Direct	278,381		236,114
Total revenue	279,029		237,435
Goods [Member] \| EMEA [Member]
Third party and other	11,978		17,475
Direct	106,989		89,414
Total revenue	118,967		106,889
Goods [Member] \| ROW [Member]
Third party and other	12,613		15,443
Direct	4,865		5,185
Total revenue	17,478		20,628
Travel [Member]
Third party and other	41,201		38,164
Travel [Member] \| North America [Member]
Third party and other	19,989		16,380
Travel [Member] \| EMEA [Member]
Third party and other	14,717		14,884
Travel [Member] \| ROW [Member]
Third party and other	$6,495		$6,900

[1]	North America includes revenue from the United States of $473.1 million and $419.9 million for the three months ended MarchB 31, 2015 and 2014, respectively. EMEA includes revenue from Switzerland of $117.5 million and $91.9 million for the three months ended MarchB 31, 2015 and 2014, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three months ended MarchB 31, 2015 and 2014.
[2]	(1)Includes revenue from deals with local and national merchants and through local events.

Segment_Information_Gross_Prof

Segment Information Gross Profit by Segment and Category (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Gross Profit by Category [Line Items]
Gross profit	$347,406		$365,512
North America [Member]
Gross Profit by Category [Line Items]
Gross profit	194,490		179,668
EMEA [Member]
Gross Profit by Category [Line Items]
Gross profit	115,237		141,037
ROW [Member]
Gross Profit by Category [Line Items]
Gross profit	37,679		44,807
Local [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	258,293	[1]	284,486	[1]
Local [Member] \| North America [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	154,776	[1]	152,622	[1]
Local [Member] \| EMEA [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	77,356	[1]	100,066	[1]
Local [Member] \| ROW [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	26,161	[1]	31,798	[1]
Goods [Member]
Gross Profit by Category [Line Items]
Gross profit	56,016		47,270
Goods [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	17,034		25,658
Goods [Member] \| Direct [Member]
Gross Profit by Category [Line Items]
Gross profit	38,982		21,612
Goods [Member] \| North America [Member]
Gross Profit by Category [Line Items]
Gross profit	23,923		12,604
Goods [Member] \| North America [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	434		1,160
Goods [Member] \| North America [Member] \| Direct [Member]
Gross Profit by Category [Line Items]
Gross profit	23,489		11,444
Goods [Member] \| EMEA [Member]
Gross Profit by Category [Line Items]
Gross profit	25,481		27,302
Goods [Member] \| EMEA [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	10,193		15,722
Goods [Member] \| EMEA [Member] \| Direct [Member]
Gross Profit by Category [Line Items]
Gross profit	15,288		11,580
Goods [Member] \| ROW [Member]
Gross Profit by Category [Line Items]
Gross profit	6,612		7,364
Goods [Member] \| ROW [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	6,407		8,776
Goods [Member] \| ROW [Member] \| Direct [Member]
Gross Profit by Category [Line Items]
Gross profit	205		-1,412
Travel [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	33,097		33,756
Travel [Member] \| North America [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	15,791		14,442
Travel [Member] \| EMEA [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	12,400		13,669
Travel [Member] \| ROW [Member] \| Third party and other [Member]
Gross Profit by Category [Line Items]
Gross profit	$4,906		$5,645

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

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Subsequent Event [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	$360
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	41.00%
Groupon, Inc. [Member]
Subsequent Event [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	285
Preferred Class A [Member]
Subsequent Event [Line Items]
Shares Exchanged for Consideration	72,000,000
Preferred Stock, Liquidation Preference, Value	$486
Preferred Class B [Member]
Subsequent Event [Line Items]
Shares Exchanged for Consideration	64,000,000
Preferred Class A [Member] \| Preferred Class A [Member]
Subsequent Event [Line Items]
Shares Exchanged for Consideration	2,000,000