Fair Value Measurements (Level 3 Contingent Purchase Price) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Measurement, Contingent Purchase Price [Roll Forward]
Balance at beginning of period			$ 96,957
Balance at end of period	$ 89,834		89,834
Fair Value, Measurements, Recurring [Member]
Fair Value Measurement, Contingent Purchase Price [Roll Forward]
Balance at beginning of period			123,757
Balance at end of period	118,571		118,571
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Contingent Purchase Price [Roll Forward]
Balance at beginning of period	119,612	$ 369,552	123,757	$ 351,134
Fair value of contingent purchase price with respect to Annovation as of February 2, 2015	0	0	0	18,000
Settlements	(4,474)	(174,550)	(7,247)	(175,650)
Fair value adjustment to contingent purchase prices included in net income (loss)	3,433	12,158	2,061	13,676
Balance at end of period	$ 118,571	$ 207,160	$ 118,571	$ 207,160