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Leases (Schedule Of Future Minimum Operating Lease Payments) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Leases [Abstract]      
Total rental expense $ 12,000,000us-gaap_LeaseAndRentalExpense $ 12,500,000us-gaap_LeaseAndRentalExpense $ 13,500,000us-gaap_LeaseAndRentalExpense
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
2013 12,309,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
2014 9,342,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
2015 6,983,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
2016 5,535,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
2017 5,278,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
After 2017 15,955,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter    
Total operating lease payments $ 55,402,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue