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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Allowance for Doubtful Accounts and Other Accounts Receivable Allowance

The following is an analysis of the allowance for doubtful accounts and other accounts receivable allowances for the years ended December 31, 2021, 2020 and 2019:

(In thousands)

 

2021

 

 

2020

 

 

2019

 

Balance at January 1

 

$

10,133

 

 

$

9,325

 

 

$

9,654

 

Provision charged to income

 

 

943

 

 

 

864

 

 

 

29

 

Accounts written off, net of recoveries

 

 

(919

)

 

 

(56

)

 

 

(358

)

Balance at December 31

 

$

10,157

 

 

$

10,133

 

 

$

9,325