Fair Value Measurements Fair Value Measurements (Schedule Of Changes In Fair Value Of Level 3 Financial Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other Payments to Acquire Businesses	$ (20,000)
Business Combination, Contingent Consideration, Liability	14,600	$ 30,600
Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	0
Business Combination, Contingent Consideration, Liability	0	0
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	1,000
Other Payments to Acquire Businesses	(17,000)
Business Combination, Contingent Consideration, Liability	$ 14,600	$ 30,600