Segment Reporting - Financial Information of Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Revenue
External customers	$ 159,269	$ 134,408
Intersegment revenue	0	0
Loss from operations	(18,907)	(15,132)
Goodwill	172,087		$ 172,087
Total assets	553,703		592,809
Consumer
Revenue
External customers	151,930	128,201
Intersegment revenue	0	0
Loss from operations	(13,477)	(10,755)
Goodwill	112,550		112,550
Total assets	459,314		492,796
Enterprise
Revenue
External customers	7,339	6,207
Intersegment revenue	2,286	2,056
Loss from operations	(5,430)	(4,377)
Goodwill	59,537		59,537
Total assets	95,179		100,753
Eliminations
Revenue
External customers	0	0
Intersegment revenue	(2,286)	(2,056)
Loss from operations	0	$ 0
Goodwill	0		0
Total assets	$ (790)		$ (740)