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Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Accrued Liabilities [Abstract]    
Accrued expenses $ 60,098 $ 65,665
Accrued employee compensation and related expenses 74,220 77,027
Accrued taxes 21,542 18,963
Accrued customer programs 46,214 43,875
Accrued liabilities $ 202,074 $ 205,530