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Other Income, Net
 12 Months Ended
Dec. 31, 2011
Other Income, Net [Abstract]  
Other Income, Net
10.  Other Income, Net

Other income (expense), net for the years ended Dec. 31 consisted of the following:

(Thousands of Dollars)
 
2011
  
2010
  
2009
 
Interest income
 $10,639  $11,023  $14,928 
COLI settlement (See Note 6)
  -   25,000   - 
Other nonoperating income
  3,722   1,689   3,650 
Life insurance policy expense
  (4,785)  (6,529)  (8,646)
Other nonoperating expense
  (321)  (40)  (161)
Other income, net
 $9,255  $31,143  $9,771