XML 63 R52.htm IDEA: XBRL DOCUMENT v3.8.0.1
Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning of period balance $ 1,058 $ 714
Additions charged to income 373 423
Warranty usage (433) (59)
Currency translation 82 (21)
End of period balance $ 1,080 $ 1,057