Note 11 - Warranty Costs (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended March 31,
	2017			2016
	(Dollars in thousands)
Warranty accrual, beginning of the period	$	43,932		$	40,691
Warranty costs accrued during the period		4,805			4,588
Warranty costs paid during the period		(5,237	)		(4,774	)
Warranty accrual, end of the period	$	43,500		$	40,505