Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net loss from continuing operations	$ (20,869)	$ (43,539)
Other comprehensive (loss) income, net of tax:
Net change in unrealized gain (loss) - Foreign Currency Translation	(16,081)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	583	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	585	(27)
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax	2	27
Other comprehensive income (loss)	(15,257)
Comprehensive loss	(35,639)	(48,448)
Net loss from discontinued operations	487	(2,057)
Comprehensive income attributable to noncontrolling interests	(4,032)	(3,523)
Comprehensive loss attributable to Groupon Inc.	(39,671)	(51,971)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Other comprehensive (loss) income, net of tax:
Net change in unrealized gain (loss), net, on AFS	239	(116)
Other comprehensive income (loss)	585
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Other comprehensive (loss) income, net of tax:
Other comprehensive income (loss)	239
Continuing Operations [Member]
Other comprehensive (loss) income, net of tax:
Net unrealized gain (losses) during the period	617	(3,796)
Reclassification of amount included in net income (loss) from continuing operations	(187)	1,462
Net change in unrealized gain (loss) - Foreign Currency Translation	430	(2,334)
Other comprehensive income (loss)	1,254	(2,423)
Comprehensive loss	(19,615)	(45,962)
Discontinued Operations, Disposed of by Sale [Member]
Other comprehensive (loss) income, net of tax:
Net unrealized gain (losses) during the period	(1,793)	(429)
Reclassification of amount included in net income (loss) from continuing operations	(14,718)	0
Net change in unrealized gain (loss) - Foreign Currency Translation	(16,511)	(429)
Other comprehensive income (loss)	$ (16,024)	$ (2,486)