Quarterly report pursuant to Section 13 or 15(d)

Product Warranty (Reconciliation Of Product Warranties) (Details)

v3.8.0.1
Product Warranty (Reconciliation Of Product Warranties) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Reconciliation of Product Warranty Accrual [Roll Forward]        
Balance at beginning of period $ 11,213 $ 11,653 $ 11,455 $ 11,487
Provision for warranty claims 1,373 922 3,304 3,360
Warranty claims (877) (462) (3,365) (2,894)
Other 108 76 423 236
Balance at end of period $ 11,817 $ 12,189 $ 11,817 $ 12,189