CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net revenue:
Online sponsorship and advertising	$ 76,475	$ 70,067	$ 60,441
Registry services	6,231	6,398	6,727
Merchandise	21,359	25,420	26,246
Publishing and other	25,066	22,372	19,467
Total net revenue	129,131	124,257	112,881
Cost of revenue:
Online sponsorship and advertising	1,741	2,104	1,695
Merchandise	12,454	15,661	14,282
Publishing and other	8,407	7,321	7,207
Total cost of revenue	22,602	25,086	23,184
Gross profit	106,529	99,171	89,697
Operating expenses:
Product and content development	26,229	24,276	22,812
Sales and marketing	40,239	38,738	35,489
General and administrative	20,980	20,660	19,518
Long-lived asset impairment charges	958	716	0
Depreciation and amortization	3,874	4,702	5,212
Total operating expenses	92,280	89,092	83,031
Income from operations	14,249	10,079	6,666
Loss in equity interests	(55)	(269)	(357)
Interest and other income, net	113	203	203
Income before income taxes	14,307	10,013	6,512
Provision for income taxes	5,658	4,025	2,858
Net income	8,649	5,988	3,654
Plus: net loss attributable to noncontrolling interest	65	52	0
Net income attributable to XO Group Inc.	$ 8,714	$ 6,040	$ 3,654
Net income per share attributable to XO Group Inc. common stockholders:
Basic (usd per share)	$ 0.35	$ 0.21	$ 0.11
Diluted (usd per share)	$ 0.35	$ 0.20	$ 0.11
Weighted average number of shares used in calculating net earnings per share
Basic (shares)	24,649	29,060	32,768
Diluted (shares)	25,218	29,692	33,660