Note 10 - Product Warranty Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Balance at beginning of period	$	36,319		$	32,008		$	35,422		$	31,695
Product warranty reserve assumed in acquisition		-			-			-			43
Payments		(4,907	)		(4,285	)		(9,892	)		(8,845	)
Provision for warranty issued		6,275			4,086			11,478			8,246
Changes in estimates for pre-existing warranties		973			1,004			1,652			1,674
Balance at end of period	$	38,660		$	32,813		$	38,660		$	32,813

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Balance at beginning of period	$	60,113		$	37,562		$	57,854		$	36,139
Deferred revenue contracts issued		5,526			7,442			10,242			10,463
Amortization of deferred revenue contracts		(2,632	)		(1,648	)		(5,089	)		(3,246	)
Balance at end of period	$	63,007		$	43,356		$	63,007		$	43,356

Schedule of Recognition of Deferred Revenue Related to Extended Warranties [Table Text Block]

Remainder of 2018	$	6,125
2019		12,682
2020		11,750
2021		9,849
2022		7,711
After 2022		14,890
Total	$	63,007

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

	June 30,		December 31,
	2018		2017
Product warranty liability
Current portion - other accrued liabilities	$	22,080	$	20,576
Long-term portion - other long-term liabilities		16,580		14,846
Total	$	38,660	$	35,422
Deferred revenue related to extended warranties
Current portion - other accrued liabilities	$	12,447	$	11,017
Long-term portion - other long-term liabilities		50,560		46,837
Total	$	63,007	$	57,854