XML 60 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1
Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance, beginning of period $ 10,483 $ 7,936
Payments made (1,222) (1,342)
Provisions 1,527 1,218
Balance, end of period 10,788 7,812
Warranty expense $ 1,527 $ 1,218