Note 11 - Warranty Costs (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Six Months Ended June 30,
	2017			2016
	(Dollars in thousands)
Warranty accrual, beginning of the period	$	43,932		$	40,691
Warranty costs accrued during the period		10,699			10,823
Warranty costs paid during the period		(11,986	)		(9,941	)
Warranty accrual, end of the period	$	42,645		$	41,573