SEGMENT INFORMATION Schedule of Revenue by Segment (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017
Schedule of Revenue by Segment [Line Items]
Service revenue		$ 295,652	[1]	$ 315,854	$ 597,449	[1]	$ 617,426
Product revenue		321,744		346,765	646,487		718,819
Total revenue		617,396	[2]	662,619	1,243,936	[2]	1,336,245
North America
Schedule of Revenue by Segment [Line Items]
Total revenue	[2]	380,264		451,912	773,520		925,269
International
Schedule of Revenue by Segment [Line Items]
Total revenue	[2]	237,132		210,707	470,416		410,976
Local
Schedule of Revenue by Segment [Line Items]
Service revenue		257,295			519,284
Local | North America
Schedule of Revenue by Segment [Line Items]
Service revenue		185,870		207,534	373,281		408,079
Local | International
Schedule of Revenue by Segment [Line Items]
Service revenue		71,425		66,108	146,003		129,683
Goods
Schedule of Revenue by Segment [Line Items]
Service revenue		8,763			17,051
Product revenue		321,744			646,487
Goods | North America
Schedule of Revenue by Segment [Line Items]
Service revenue		3,796		4,112	8,670		5,816
Product revenue		170,710		217,946	351,597		468,592
Goods | International
Schedule of Revenue by Segment [Line Items]
Service revenue		4,967		4,984	8,381		9,268
Product revenue		151,034		128,819	294,890		250,227
Travel
Schedule of Revenue by Segment [Line Items]
Service revenue		29,594			61,114
Travel | North America
Schedule of Revenue by Segment [Line Items]
Service revenue		19,888		22,320	39,972		42,782
Travel | International
Schedule of Revenue by Segment [Line Items]
Service revenue		9,706		10,796	21,142		21,798
UNITED STATES
Schedule of Revenue by Segment [Line Items]
Revenues		371,100		442,700	756,500		907,400
UNITED KINGDOM
Schedule of Revenue by Segment [Line Items]
Revenues		$ 91,500		$ 74,400	$ 174,500		$ 139,900

[1] (1)For the three months ended June 30, 2018, reflects a $9.2 million increase for refunds on service revenue transactions for which the merchant's share is not recoverable and customer credits issued for relationship purposes, which are classified as reductions of revenue under Topic 606, and an increase of $0.5 million related to the timing of recognition of revenue from hotel reservation offerings, partially offset by decreases of $2.9 million related to the timing of recognition of variable consideration from unredeemed vouchers and $0.8 million related to the timing of recognition of breakage revenue from customer credits that are not expected to be used.

[2] (1)North America includes revenue from the United States of $371.1 million and $442.7 million for the three months ended June 30, 2018 and 2017, respectively, and $756.5 million and $907.4 million for the six months ended June 30, 2018 and 2017, respectively. International includes revenue from the United Kingdom of $91.5 million and $74.4 million for the three months ended June 30, 2018 and 2017, respectively, and $174.5 million and $139.9 million for the six months ended June 30, 2018 and 2017, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three and six months ended June 30, 2018 and 2017.