Note 10 - Warranty Costs (Details) - Changes In Warranty Accrual (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Changes In Warranty Accrual [Abstract]
Warranty accrual, beginning of the period	$ 15,514	$ 17,572
Warranty costs accrued during the period	1,789	1,034
Warranty costs paid during the period	(2,844)	(2,677)
Warranty accrual, end of the period	$ 14,459	$ 15,929