Commitments and Contingencies Purchase Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Unrecorded Unconditional Purchase Obligation [Line Items]
Letters of credit for real estate leases	$ 6,800,000
Bandwidth and Co-location Commitments
Bandwidth and purchase order commitments
2014	103,626,000
2015	8,587,000
2016	2,445,000
2017	1,446,000
2018	68,000
Thereafter	23,000
Total	116,195,000
Purchase Order Commitments
Bandwidth and purchase order commitments
2014	65,267,000
2015	6,212,000
2016	274,000
2017	0
2018	0
Thereafter	0
Total	$ 71,753,000