XML 41 R28.htm IDEA: XBRL DOCUMENT v3.8.0.1
Schedule II, Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]  
Schedule II, Valuation and Qualifying Accounts
NSP-WISCONSIN AND SUBSIDIARIES
VALUATION AND QUALIFYING ACCOUNTS
YEARS ENDED DEC. 31, 2017, 2016 AND 2015
(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:
 
 
 
 
 
 
 
 
 
2017
$
4,865

 
$
4,105

 
$
952

 
$
5,049

 
$
4,873

2016
5,128

 
3,730

 
1,008

 
5,001

 
4,865

2015
5,821

 
3,947

 
1,161

 
5,801

 
5,128


(a) 
Recovery of amounts previously written off.
(b) 
Deductions relate primarily to bad debt write-offs.