Commitments and Contingencies Narrative (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 2,700,000	$ 900,000	$ 5,300,000	$ 1,500,000
Long-term Purchase Commitment [Line Items]
Non-cancellable open orders	21,100,000		21,100,000		16,700,000
Letters of credit available	900,000		900,000		900,000
Amount drawn against letters of credit	0		0
Software and Services [Member]
Long-term Purchase Commitment [Line Items]
Non-cancellable open orders	$ 10,800,000		$ 10,800,000