Intangible Assets - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 101,395	$ 77,970
Accumulated amortization	(45,018)	(40,854)
Total	56,377	37,116
Owned website names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	14,939	16,581
Accumulated amortization	(11,289)	(11,402)
Total	3,650	5,179
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	20,842	20,842
Accumulated amortization	(19,197)	(18,258)
Total	1,645	2,584
Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,954	7,954
Accumulated amortization	(7,929)	(7,915)
Total	25	39
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	207	207
Accumulated amortization	(112)	(81)
Total	95	126
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,465	5,477
Accumulated amortization	(2,389)	(2,151)
Total	3,076	3,326
gTLD deposit receivable
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	51,988	26,909
Accumulated amortization	(4,102)	(1,047)
Total	$ 47,886	$ 25,862