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Supplemental Financial Information
12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Supplemental Financial Information

(17)

Supplemental Financial Information

Additions and deductions related to the allowance for doubtful accounts receivable for 2019, 2018 and 2017 were as follows (in thousands):

 

 

 

Balance at

Beginning

of Year

 

 

Additions

 

 

Deductions

 

 

Balance at

End of Year

 

Allowance for doubtful accounts

   receivable:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year ended December 31, 2019

 

$

10,462

 

 

$

5,079

 

 

$

(4,779

)

 

$

10,762

 

Year ended December 31, 2018

 

$

10,158

 

 

$

4,776

 

 

$

(4,472

)

 

$

10,462

 

Year ended December 31, 2017

 

$

9,138

 

 

$

5,245

 

 

$

(4,225

)

 

$

10,158