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Schedule II Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2011
Schedule II - Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
SCHEDULE II

NSP-WISCONSIN AND SUBSIDIARIES
VALUATION AND QUALIFYING ACCOUNTS
YEARS ENDED DEC. 31, 2011, 2010 AND 2009
(amounts in thousands)
 
      
Additions
       
   
Balance at
Jan. 1
  
Charged to
Costs and
Expenses
  
Charged to
Other
Accounts (a)
  
Deductions
from
Reserves (b)
  
Balance
at Dec. 31
 
Allowance for bad debts:
               
2011
 $4,262  $3,842  $1,241  $4,579  $4,766 
2010
  4,709   3,294   1,207   4,948   4,262 
2009
  4,658   4,505   1,050   5,504   4,709 

(a)
Recovery of amounts previously written off.
(b)
Principally bad debts written off or transferred.