CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Total revenue	$ 592,883	$ 1,970,711
Cost of revenue:
Total cost of revenue	286,894	1,023,768
Gross profit	305,989	946,943
Operating expenses:
Marketing	92,717	288,456
Selling, general and administrative	160,214	677,109
Restructuring Charges	35	18,818
Gain on sale of intangible assets	0	(17,149)
Total operating expenses	252,966	967,234
Income (loss) from operations	53,023	(20,291)
Other income (expense), net	(4,860)	8,822
Income (loss) from continuing operations before provision (benefit) for income taxes	48,163	(11,469)
Provision (benefit) for income taxes	988	11,001
Income (loss) from continuing operations	47,175	(22,470)
Income (loss) from discontinued operations, net of tax	0	(1,751)
Net income (loss)	47,175	(24,221)
Net income attributable to noncontrolling interests	(2,560)	(9,460)
Net income (loss) attributable to Groupon, Inc.	$ 44,615	$ (33,681)
Basic and diluted net income (loss) per share:
Continuing operations (in usd per share)	$ 0.08	$ (0.06)
Discontinued operations (in usd per share)	0.00	0.00
Basic and diluted net income (loss) per share (in usd per share)	$ 0.08	$ (0.06)
Weighted average number of shares outstanding
Basic (in shares)	568,634,988	559,726,154
Diluted (in shares)	576,379,421	559,726,154
Proceeds from Sale of Debt Securities, Available-for-sale	$ 8,600
Gain (Loss) on Sale of Equity Investments		$ 16,000
Proceeds from Sale of Other Investments		14,700
Total net consideration received		1,300
Gain (Loss) on Disposition of Assets		7,600
Service
Revenue:
Total revenue	289,214	919,884
Cost of revenue:
Total cost of revenue	29,792	123,209
Product
Revenue:
Total revenue	303,669	1,050,827
Cost of revenue:
Total cost of revenue	$ 257,102	$ 900,559