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Product Warranties
 12 Months Ended
Dec. 31, 2017
Product Warranties Disclosures [Abstract]  
Product Warranties PRODUCT WARRANTIES

Changes in our product warranty obligations were as follows (in thousands):
 
2017
 
2016
 
2015
Balance, January 1
$
7,450

 
$
8,545

 
$
2,246

Accruals
3,008

 
2,480

 
2,302

Payments
(4,341
)
 
(3,575
)
 
(1,553
)
Business acquisition (Note 2)
—

 
—

 
5,550

Balance, December 31
$
6,117

 
$
7,450

 
$
8,545