XML 58 R47.htm IDEA: XBRL DOCUMENT v3.7.0.1
Product Warranty - Reconciliation of Reserve for Warranty Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Guarantees [Abstract]    
Warranty policy term 2 years  
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Beginning balance $ 5,395 $ 5,706
Provision 1,922 1,737
Claims paid/costs incurred (1,372) (1,093)
Ending balance $ 5,945 $ 6,350