Intangible Assets - Amortization Expense by Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 18,706	$ 38,316	$ 36,519
Continuing and Discontinued Operations
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	18,706	42,559	44,409
Service Costs
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	12,680	28,523	28,974
Sales and Marketing
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	3,862	4,733	1,987
Product Development
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,440	4,212	4,884
General and Administrative
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 724	847	674
Discontinued Operations
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 4,244	$ 7,890