Discontinued Operations and Other Dispositions (Details) - USD ($) $ in Thousands				3 Months Ended			6 Months Ended
	May 09, 2016	Apr. 12, 2016	May 27, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	May 12, 2016
Disposal Group Income Statement [Abstract]
Third party and other revenue				$ 318,129	$ 340,846		$ 652,697	$ 700,967
Direct revenue				437,901	397,549		835,304	787,784
Third party and other cost of revenue				(43,800)	(47,545)		(90,581)	(99,242)
Direct cost of revenue				(378,642)	(353,843)		(724,504)	(705,096)
Marketing expense				(91,993)	(57,007)		(181,758)	(109,540)
Selling, general and administrative expense				(277,168)	(288,721)		(558,156)	(578,568)
Other income, net				10,761	(2,941)		7,275	16,986
Loss from discontinued operations before provision for income taxes					(10,788)			(31,280)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax					202,158			202,158
Provision for income taxes					(64,191)	$ (26,800)		(37,415)
Income (loss) from discontinued operations, net of tax					127,179			133,463
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax					138,000
Consideration received upon divestiture of a consolidated subsidiary			$ 398,800
Proceeds from Divestiture of Interest in Consolidated Subsidiaries					285,000
Noncash or Part Noncash Acquisition, Investments Acquired							0	122,075
Professional Fees			8,300
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax				1,800			300	(4,400)
Gain (Loss) on Disposition of Business				9,339	0		9,339	0
Discontinued Operations, Disposed of by Sale [Member]
Disposal Group Income Statement [Abstract]
Third party and other revenue					10,262			28,145
Direct revenue					14,242			39,065
Third party and other cost of revenue					(4,434)			(13,958)
Direct cost of revenue					(12,082)			(38,031)
Marketing expense					(3,472)			(8,495)
Selling, general and administrative expense					(15,339)			(38,102)
Other income, net					(35)			96
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax				0	$ (12,313)		0	(12,313)
Ticket Monster [Member]
Disposal Group Income Statement [Abstract]
Net Book Value			$ 184,300
Groupon Russia [Member]
Disposal Group Income Statement [Abstract]
Professional Fees		$ 400
Net Book Value		(1,600)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax		$ 7,700
Gain (Loss) on Disposition of Business				8,900
Breadcrumb [Member]
Disposal Group Income Statement [Abstract]
Noncash or Part Noncash Acquisition, Investments Acquired							$ 8,323	0
Professional Fees	$ 100
Net Book Value									$ 7,800
Gain (Loss) on Disposition of Business				$ 400
Monster LP [Member]
Disposal Group Income Statement [Abstract]
Noncash or Part Noncash Acquisition, Investments Acquired								$ 122,100