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Additional Financial Information Disclosures (Tables)
 3 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Changes in Warranty and After-Sale Costs Reserve Changes in the Company’s warranty and after-sale costs reserve are as follows:

 

  

 

Three months ended

March 31,

 

 

(In thousands)

 

2021

 

 

2020

 

 

Balance at beginning of period

 

$

11,617

 

 

$

5,583

 

 

Net additions charged to earnings

 

 

1,420

 

 

 

1,161

 

 

Costs incurred

 

 

(579

)

 

 

(763

)

 

Balance at end of period

 

$

12,458

 

 

$

5,981