Fair Value (Change in Carrying Value Associated with Contingent Payment Arrangements Level 3 Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measurement Level 3 reconciliation
Balance as of beginning of period	$ 30,861	$ 42,032	$ 31,399	$ 42,436
Additions	11,893	0	11,893	0
Accretion	354	443	1,060	1,328
Changes in estimates	(21,483)	0	(21,483)	0
Payments	(3,608)	(3,658)	(4,852)	(4,947)
Balance as of end of period	$ 18,017	$ 38,817	$ 18,017	$ 38,817