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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts  
Valuation and Qualifying Accounts

13.  Valuation and Qualifying Accounts

 

Our valuation and qualifying accounts as of December 31, 2012, 2011 and 2010 are as follows:

 

Allowance for doubtful accounts

 

Balance at
Beginning
of Year

 

Charged to
Costs and
Expenses

 

Deductions

 

Balance at
End of
Year

 

 

 

(In thousands)

 

For the years ended:

 

 

 

 

 

 

 

 

 

December 31, 2012

 

$

11,916

 

$

116,742

 

$

(114,824

)

$

13,834

 

December 31, 2011

 

$

29,650

 

$

94,678

 

$

(112,412

)

$

11,916

 

December 31, 2010

 

$

16,372

 

$

115,478

 

$

(102,200

)

$

29,650