Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities [Abstract]
Accrued expenses	$ 71,984	$ 65,665
Accrued employee compensation and related expenses	91,113	77,027
Accrued taxes	23,973	18,963
Accrued customer programs	49,061	43,875
Total accrued liabilities	$ 236,131	$ 205,530