XML 55 R43.htm IDEA: XBRL DOCUMENT v3.6.0.2
Nature of Business and Summary of Significant Accounting Policies - Summary of Warranty Expense and Write-Off Activity (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]      
Balance at beginning of period $ 8,739 $ 8,415 $ 8,977
Plus: Amounts charged to cost and expenses 8,561 2,998 3,103
Less: Deductions (8,752) (2,674) (3,665)
Balance at end of period $ 8,548 $ 8,739 $ 8,415