Note 10 - Warranty Costs (Tables)

6 Months Ended

Jun. 30, 2014

Product Warranties Disclosures [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

	Six Months Ended June 30,
	2014			2013
	(Dollars in thousands)
Warranty accrual, beginning of the period	$	13,811		$	15,514
Warranty costs accrued during the period		2,812			1,182
Warranty costs paid during the period		(3,277	)		(1,772	)
Warranty accrual, end of the period	$	13,346		$	14,924