Fair Value Measurements (Reconciliation Of The Fair Value Of The Liabilities That Use Significant Unobservable Inputs (Level 3)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Measurements [Abstract]
Balance at beginning of period	$ (4,650)	$ (9,310)	$ (4,650)	$ (17,486)
Adjustment of provisional amounts				(50)
Settlement of contingent consideration				8,061
Gain/ (loss) included in contingent consideration		4,660		4,825
Transfers out of Level 3 fair value measurements	$ 4,650		$ 4,650
Balance at end of period		$ (4,650)		$ (4,650)