Note 10 - Warranty Costs (Tables)

3 Months Ended

Mar. 31, 2014

Product Warranties Disclosures [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

	Three Months Ended March 31,
	2014			2013
	(Dollars in thousands)
Warranty accrual, beginning of the period	$	13,811		$	15,514
Warranty costs accrued during the period		1,183			414
Warranty costs paid during the period		(1,361	)		(796	)
Warranty accrual, end of the period	$	13,633		$	15,132