Note 6 - Product Warranty Obligations (Tables)

6 Months Ended

Jun. 30, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Balance at beginning of period	$	31,907		$	40,207		$	33,734		$	36,112
Payments		(4,076	)		(3,903	)		(11,024	)		(9,596	)
Provision for warranties issued		5,764			9,352			12,028			20,340
Changes in estimates for pre-existing warranties		(1,424	)		(5,500	)		(2,567	)		(6,700	)
Balance at end of period	$	32,171		$	40,156		$	32,171		$	40,156

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Balance at beginning of period	$	24,632		$	15,042		$	23,092		$	13,473
Deferred revenue on extended warranty contracts sold		1,795			2,268			4,014			4,406
Amortization of deferred revenue on extended warranty contracts		(748	)		(581	)		(1,427	)		(1,150	)
Balance at end of period	$	25,679		$	16,729		$	25,679		$	16,729

Product Warranty Obligations Included in Consolidated Balance Sheet [Table Text Block]

	June 30,		December 31,
	2014		2013
Product warranty liability
Current portion - other accrued liabilities	$	25,331	$	26,080
Long-term portion - other long-term liabilities		6,840		7,654
Total	$	32,171	$	33,734
Deferred revenue related to extended warranty
Current portion - other accrued liabilities	$	5,912	$	3,325
Long-term portion - other long-term liabilities		19,767		19,767
Total	$	25,679	$	23,092