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Additional Financial Information Disclosures (Tables)
 9 Months Ended
Sep. 30, 2015
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
 
Nine months ended
 
September 30,
 
September 30,
(In thousands)
2015
 
2014
 
2015
 
2014
Balance at beginning of period
$
2,360

 
$
1,433

 
$
1,739

 
$
882

Net additions charged to earnings
337

 
366

 
1,576

 
1,544

Costs incurred
(346
)
 
(659
)
 
(964
)
 
(1,286
)
Balance at end of period
$
2,351

 
$
1,140

 
$
2,351

 
$
1,140