Segment Information - Narratives (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Concentration Risk [Line Items]
Number of reportable segments	2	1
Customer concentration risk ten percent or more of net revenue [Member]
Concentration Risk [Line Items]
Customer concentration percentage	0.00%	0.00%	0.00%
Net Revenue [Member]
Concentration Risk [Line Items]
Customer concentration percentage	10.00%
Net Revenue [Member] | Comcast [Member]
Concentration Risk [Line Items]
Customer concentration percentage	16.00%	12.00%	11.00%