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Accounts And Other Receivables (Schedule Of Accounts And Other Receivable) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts and Notes Receivable, Net [Abstract]    
Trade, less allowance for doubtful accounts and sales returns of $2,610 in 2014 and $3,327 in 2013 $ 106,093us-gaap_AccountsReceivableNetCurrent $ 94,684us-gaap_AccountsReceivableNetCurrent
Other 7,248us-gaap_OtherReceivables 4,562us-gaap_OtherReceivables
Total 113,341us-gaap_ReceivablesNetCurrent 99,246us-gaap_ReceivablesNetCurrent
Allowance for Doubtful Accounts and Sales Returns $ 2,610us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 3,327us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent