Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 1,209,289	$ 1,122,935
Accounts receivable, net	96,713	108,747
Deferred income taxes	31,211	19,243
Prepaid expense and other current assets	150,573	72,402
Total current assets	1,487,786	1,323,327
Property, equipment and software, net	121,072	51,800
Goodwill	206,684	166,903
Intangible assets, net	42,597	45,667
Investments	84,209	50,604
Deferred income taxes, non-current	29,916	46,104
Other non-current assets	59,210	90,071
Total Assets	2,031,474	1,774,476
Current liabilities:
Accounts payable	59,865	40,918
Accrued merchant and supplier payable	671,305	520,723
Accrued expenses	246,924	212,007
Deferred income taxes	53,700	76,841
Other current liabilities	136,647	144,673
Total current liabilities	1,168,441	995,162
Deferred income taxes, non-current	20,860	7,428
Other non-current liabilities	100,072	70,766
Total Liabilities	1,289,373	1,073,356
Commitments and contingencies
Redeemable noncontrolling interests	0	1,653
Stockholders' Equity
Additional paid-in capital	1,485,006	1,388,253
Accumulated deficit	(753,477)	(698,704)
Accumulated other comprehensive income	12,446	12,928
Total Groupon, Inc. Stockholders' Equity	744,040	702,541
Noncontrolling interests	(1,939)	(3,074)
Total Equity	742,101	699,467
Total Liabilities and Equity	2,031,474	1,774,476
Common Class A [Member]
Stockholders' Equity
Common Stock, Value, Issued	65	64
Common Class B [Member]
Stockholders' Equity
Common Stock, Value, Issued	0	0
Common Stock [Member]
Stockholders' Equity
Common Stock, Value, Issued	$ 0	$ 0