XML 39 R75.htm IDEA: XBRL DOCUMENT v2.4.0.6
Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Derivative [Line Items]      
(Proceeds from) or payments to settlement of interest rate protection agreement $ (9,910,000)      
Term of debt securities, in years 10    
Outstanding senior notes 400,000,000    
Senior notes, maturity year 2013    
Foreign currency forward contracts settled for a loss, amount 700,000    
Number of foreign currency forward contracts outstanding 0    
Fair Value of treasury lock 48,800,000    
Notional amount of interest rate protection agreement outstanding 400,000,000    
Interest rate contracts, expected year of maturity 2012    
Amount of gain (loss) to be reclassified from accumulated OCI into income 1,800,000    
Amount of gain (loss) to be reclassified from accumulated OCI into income, net of tax 1,200,000    
Ineffective portion of derivative instruments 0    
2003 Interest Rate Protection Agreement [Member]
      
Derivative [Line Items]      
(Proceeds from) or payments to settlement of interest rate protection agreement (22,800,000)    
2008 Interest Rate Protection Agreement [Member]
      
Derivative [Line Items]      
(Proceeds from) or payments to settlement of interest rate protection agreement 4,400,000    
2010 Interest Rate Protection Agreement [Member]
      
Derivative [Line Items]      
(Proceeds from) or payments to settlement of interest rate protection agreement $ (9,900,000)