Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 61,350		$ 61,350		$ 53,602
Accumulated amortization	(39,201)		(39,201)		(38,334)
Net	22,149		22,149		15,268
Amortization of intangible assets	1,908	2,191	3,599	4,216
Owned website names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	17,565		17,565		18,580
Accumulated amortization	(11,278)		(11,278)		(11,534)
Net	6,287		6,287		7,046
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	20,976		20,976		20,976
Accumulated amortization	(17,743)		(17,743)		(17,119)
Net	3,233		3,233		3,857
Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,990		7,990		7,990
Accumulated amortization	(7,905)		(7,905)		(7,896)
Net	85		85		94
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	207		207		207
Accumulated amortization	(60)		(60)		(42)
Net	147		147		165
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,468		5,468		5,468
Accumulated amortization	(1,992)		(1,992)		(1,743)
Net	3,476		3,476		3,725
gTLDs
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,144		9,144		381
Accumulated amortization	(223)		(223)
Net	8,921		8,921		381
Service costs
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,379	1,350	2,723	2,618
Sales and marketing
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	323	768	601	1,456
Product development
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	4	5	9	9
General and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 202	$ 68	$ 266	$ 133