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Schedule II, Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Schedule II, Valuation and Qualifying Accounts
SOUTHWESTERN PUBLIC SERVICE CO.
VALUATION AND QUALIFYING ACCOUNTS
YEARS ENDED DEC. 31, 2014, 2013 AND 2012
(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:
 
 
 
 
 
 
 
 
 
 
2014
 
$
5,475

 
$
4,137

 
$
1,089

 
$
4,862

 
$
5,839

2013
 
4,722

 
3,437

 
1,076

 
3,760

 
5,475

2012
 
5,380

 
2,915

 
1,202

 
4,775

 
4,722


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