Fair Value Measurements (Details 1) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance of contingent payments	$ 172,227	$ 151,848
Payments	(63,627)	(61,441)
Grants	100,192	68,642
Redemption value adjustments	(8,003)	20,816
Transfers (to) from fixed payments	0	(5,146)
Foreign translation adjustment	(2,149)	(2,492)
Ending Balance of contingent payments	$ 198,640	$ 172,227