Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 65,705	$ 16,290
Other adjustment related to Chango (See Note 7)	0	(261)
Ending balance	65,705	65,705	$ 16,290
iSocket
Goodwill [Roll Forward]
Measurement period adjustment related to Chango (See Note 7)	0	(2,317)	$ 2,300
Chango
Goodwill [Roll Forward]
Additions from the acquisition of Chango	0	52,513
Measurement period adjustment related to Chango (See Note 7)	$ 0	$ (520)