Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Derivative instruments	$ 664	$ 930
Liabilities
Contingent consideration	7,104	12,545
Level 1
Assets
Derivative instruments	0	0
Liabilities
Contingent consideration	0	0
Level 2
Assets
Derivative instruments	664	930
Liabilities
Contingent consideration	0	0
Level 3
Assets
Derivative instruments	$ 0	0
Liabilities
Contingent consideration		$ 12,545