Note 11 - Warranty Accrual (Details) - Warranty Accrual and Payment Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Warranty Accrual and Payment Activity [Abstract]
Balance at beginning of period	$ 21,447	$ 23,098	$ 22,238	$ 23,151
Expense provisions	1,243	1,154	2,157	2,276
Cash payments	(1,237)	(1,527)	(2,142)	(3,002)
Adjustments	(1,275)	0	(2,075)	300
Balance at end of period	$ 20,178	$ 22,725	$ 20,178	$ 22,725