Commitments and Contingencies (Details 2) (Access, MuGard Rights, USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Jun. 06, 2013
Acquisition-related Contingent Consideration
Fair value of the contingent consideration	$ 14,000	$ 14,000	$ 13,700
Significant Unobservable Inputs (Level 3)
Acquisition-related Contingent Consideration
Discount rate (as a percent)	19.00%	19.00%
Recurring basis | Significant Unobservable Inputs (Level 3)
Acquisition-related Contingent Consideration
Fair value of the contingent consideration			$ 13,700
Discount rate (as a percent)	15.00%	15.00%