Note 11 - Warranty Accrual (Details) - Warranty Accrual and Payment Activity (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Warranty Accrual and Payment Activity [Abstract]
Balance at beginning of period	$ 23,151	$ 25,525	$ 34,704
Expense provisions	5,562	4,216	4,224
Cash payments	(6,475)	(6,590)	(7,925)
Adjustments			(5,478)
Balance at end of period	$ 22,238	$ 23,151	$ 25,525