CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Total Groupon, Inc. Stockholders' Equity (Deficit)	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2022			40,786,996
Beginning balance (in shares) at Dec. 31, 2022					(10,294,117)
Beginning balance at Dec. 31, 2022	$ 8,858	$ 8,475	$ 4	$ 2,322,672	$ (922,666)	$ (1,394,477)	$ 2,942	$ 383
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(34,461)	(34,995)				(29,147)	(5,848)	534
Vesting of RSUs and PSUs (in shares)			420,471
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(140,819)
Tax withholdings related to net share settlements of stock-based compensation awards	(1,031)	(1,031)		(1,031)
Stock-based compensation on equity-classified awards	2,547	2,547		2,547
Distributions to noncontrolling interest holders	(637)							(637)
Shares issued under ESPP (in shares)			33,803
Shares issued under ESPP	246	246		246
Ending balance (in shares) at Mar. 31, 2023			41,100,451
Ending balance (in shares) at Mar. 31, 2023					(10,294,117)
Ending balance at Mar. 31, 2023	(24,478)	(24,758)	$ 4	2,324,434	$ (922,666)	(1,423,624)	(2,906)	280
Beginning balance (in shares) at Dec. 31, 2022			40,786,996
Beginning balance (in shares) at Dec. 31, 2022					(10,294,117)
Beginning balance at Dec. 31, 2022	8,858	8,475	$ 4	2,322,672	$ (922,666)	(1,394,477)	2,942	383
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(70,385)
Ending balance (in shares) at Sep. 30, 2023			42,132,235
Ending balance (in shares) at Sep. 30, 2023					(10,294,117)
Ending balance at Sep. 30, 2023	(49,269)	(49,441)	$ 4	2,336,830	$ (922,666)	(1,477,589)	13,980	172
Beginning balance (in shares) at Dec. 31, 2022			40,786,996
Beginning balance (in shares) at Dec. 31, 2022					(10,294,117)
Beginning balance at Dec. 31, 2022	$ 8,858	8,475	$ 4	2,322,672	$ (922,666)	(1,394,477)	2,942	383
Ending balance (in shares) at Dec. 31, 2023	31,853,149		42,147,266
Ending balance (in shares) at Dec. 31, 2023	(10,294,117)				(10,294,117)
Ending balance at Dec. 31, 2023	$ (40,312)	(40,631)	$ 4	2,337,565	$ (922,666)	(1,449,887)	(5,647)	319
Beginning balance (in shares) at Mar. 31, 2023			41,100,451
Beginning balance (in shares) at Mar. 31, 2023					(10,294,117)
Beginning balance at Mar. 31, 2023	(24,478)	(24,758)	$ 4	2,324,434	$ (922,666)	(1,423,624)	(2,906)	280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(6,259)	(6,862)				(12,607)	5,745	603
Vesting of RSUs and PSUs (in shares)			689,050
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(268,367)
Tax withholdings related to net share settlements of stock-based compensation awards	(1,207)	(1,207)		(1,207)
Stock-based compensation on equity-classified awards	7,809	7,809		7,809
Distributions to noncontrolling interest holders	(692)							(692)
Ending balance (in shares) at Jun. 30, 2023			41,521,134
Ending balance (in shares) at Jun. 30, 2023					(10,294,117)
Ending balance at Jun. 30, 2023	(24,827)	(25,018)	$ 4	2,331,036	$ (922,666)	(1,436,231)	2,839	191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(29,665)	(30,217)				(41,358)	11,141	552
Vesting of RSUs and PSUs (in shares)			250,709
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(89,184)
Tax withholdings related to net share settlements of stock-based compensation awards	(980)	(980)		(980)
Stock-based compensation on equity-classified awards	4,088	4,088		4,088
Distributions to noncontrolling interest holders	(571)							(571)
Exercise of stock options	2,625	2,625		2,625
Exercise of stock options (in share)			437,500
Shares issued under ESPP (in shares)			12,076
Shares issued under ESPP	61	61		61
Ending balance (in shares) at Sep. 30, 2023			42,132,235
Ending balance (in shares) at Sep. 30, 2023					(10,294,117)
Ending balance at Sep. 30, 2023	$ (49,269)	(49,441)	$ 4	2,336,830	$ (922,666)	(1,477,589)	13,980	172
Beginning balance (in shares) at Dec. 31, 2023	31,853,149		42,147,266
Beginning balance (in shares) at Dec. 31, 2023	(10,294,117)				(10,294,117)
Beginning balance at Dec. 31, 2023	$ (40,312)	(40,631)	$ 4	2,337,565	$ (922,666)	(1,449,887)	(5,647)	319
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	846	81				(12,271)	12,352	765
Vesting of RSUs and PSUs (in shares)			55,162
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(15,130)
Tax withholdings related to net share settlements of stock-based compensation awards	(356)	(356)		(356)
Stock-based compensation on equity-classified awards	2,427	2,427		2,427
Distributions to noncontrolling interest holders	(827)							(827)
Rights Offering, net of issuance costs (in shares)			7,079,646
Rights Offering, net of issuance costs	79,619	79,619	$ 1	79,618
Shares issued under ESPP (in shares)			5,388
Shares issued under ESPP	28	28		28
Ending balance (in shares) at Mar. 31, 2024			49,272,332
Ending balance (in shares) at Mar. 31, 2024					(10,294,117)
Ending balance at Mar. 31, 2024	$ 41,425	41,168	$ 5	2,419,282	$ (922,666)	(1,462,158)	6,705	257
Beginning balance (in shares) at Dec. 31, 2023	31,853,149		42,147,266
Beginning balance (in shares) at Dec. 31, 2023	(10,294,117)				(10,294,117)
Beginning balance at Dec. 31, 2023	$ (40,312)	(40,631)	$ 4	2,337,565	$ (922,666)	(1,449,887)	(5,647)	319
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	$ (12,534)
Exercise of stock options (in share)	0
Ending balance (in shares) at Sep. 30, 2024	39,762,909		50,057,026
Ending balance (in shares) at Sep. 30, 2024	(10,294,117)				(10,294,117)
Ending balance at Sep. 30, 2024	$ 40,210	39,994	$ 5	2,432,705	$ (922,666)	(1,458,265)	(11,785)	216
Beginning balance (in shares) at Mar. 31, 2024			49,272,332
Beginning balance (in shares) at Mar. 31, 2024					(10,294,117)
Beginning balance at Mar. 31, 2024	41,425	41,168	$ 5	2,419,282	$ (922,666)	(1,462,158)	6,705	257
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(4,810)	(5,433)				(10,035)	4,602	623
Vesting of RSUs and PSUs (in shares)			877,372
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(151,446)
Tax withholdings related to net share settlements of stock-based compensation awards	(1,967)	(1,967)		(1,967)
Stock-based compensation on equity-classified awards	6,465	6,465		6,465
Distributions to noncontrolling interest holders	(703)							(703)
Ending balance (in shares) at Jun. 30, 2024			49,998,258
Ending balance (in shares) at Jun. 30, 2024					(10,294,117)
Ending balance at Jun. 30, 2024	40,410	40,233	$ 5	2,423,780	$ (922,666)	(1,472,193)	11,307	177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(8,570)	(9,164)				13,928	(23,092)	594
Vesting of RSUs and PSUs (in shares)			56,513
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(3,969)
Tax withholdings related to net share settlements of stock-based compensation awards	(69)	(69)		(69)
Stock-based compensation on equity-classified awards	8,930	8,930		8,930
Distributions to noncontrolling interest holders	(555)							(555)
Shares issued under ESPP (in shares)			6,224
Shares issued under ESPP	$ 64	64		64
Ending balance (in shares) at Sep. 30, 2024	39,762,909		50,057,026
Ending balance (in shares) at Sep. 30, 2024	(10,294,117)				(10,294,117)
Ending balance at Sep. 30, 2024	$ 40,210	$ 39,994	$ 5	$ 2,432,705	$ (922,666)	$ (1,458,265)	$ (11,785)	$ 216