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Accumulated Other Comprehensive Income (Loss) (Schedule Of After-Tax Changes In Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated other comprehensive income (loss), Beginning balance $ (102,347)  
Other comprehensive income before reclassifications 373  
Amounts reclassified from accumulated other comprehensive income 2,287  
Net other comprehensive income - current period 2,660 7,075
Accumulated other comprehensive income (loss), Ending balance (99,687)  
Foreign Currency Translation [Member]
    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated other comprehensive income (loss), Beginning balance 131  
Other comprehensive income before reclassifications 865  
Net other comprehensive income - current period 865  
Accumulated other comprehensive income (loss), Ending balance 996  
Gain (Loss) On Derivative Financial Instruments [Member]
    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated other comprehensive income (loss), Beginning balance 993  
Other comprehensive income before reclassifications (492)  
Amounts reclassified from accumulated other comprehensive income (26)  
Net other comprehensive income - current period (518)  
Accumulated other comprehensive income (loss), Ending balance 475  
Pension & Other Post-Retirement Benefit Adjust. [Member]
    
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated other comprehensive income (loss), Beginning balance (103,471)  
Amounts reclassified from accumulated other comprehensive income 2,313  
Net other comprehensive income - current period 2,313  
Accumulated other comprehensive income (loss), Ending balance $ (101,158)