Note 11 - Warranty Costs (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Nine Months Ended September 30,
	2017			2016
	(Dollars in thousands)
Warranty accrual, beginning of the period	$	43,932		$	40,691
Warranty costs accrued during the period		16,097			16,903
Warranty costs paid during the period		(18,303	)		(15,088	)
Warranty accrual, end of the period	$	41,726		$	42,506