Note 11 - Warranty Reserves (Details) - Warranty Accrual and Payment Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Warranty Accrual and Payment Activity [Abstract]
Balance at beginning of period	$ 20,178	$ 22,725	$ 22,238	$ 23,151
Expense provisions	1,206	1,367	3,363	3,643
Cash payments	(1,758)	(1,649)	(3,900)	(4,651)
Adjustments	(525)	0	(2,600)	300
Balance at end of period	$ 19,101	$ 22,443	$ 19,101	$ 22,443