Significant Accounting Policies (Tables)

12 Months Ended

Sep. 29, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of activity in accounts receivable allowance

Activity in accounts receivable allowance is as follows (in thousands):

	Fiscal
	2018			2017			2016
Beginning balance	$	6,890		$	2,420		$	3,015
Additions charged to expenses	1,980			4,190			2,084
Accruals related to acquisitions	37			4,390			—
Deductions from reserves	(4,339		)	(4,110		)	(2,679		)
Ending balance	$	4,568		$	6,890		$	2,420

Schedule of inventories

Inventories are stated at the lower of cost (first-in, first-out or weighted average cost) or net realizable value. Inventories are as follows (in thousands):

	Fiscal year-end
	2018		2017
Purchased parts and assemblies	$	137,566	$	114,285
Work-in-process	186,240		159,784
Finished goods	162,935		140,738
Total inventories	$	486,741	$	414,807

Schedule of property and equipment cost, accumulated depreciation and amortization and estimated useful lives

Cost, accumulated depreciation and amortization, and estimated useful lives are as follows (dollars in thousands):

	Fiscal year-end
	2018			2017			Useful Life
Land	$	17,655		$	18,550
Buildings and improvements	165,535			159,111			5-40 years
Equipment, furniture and fixtures	359,721			335,953			3-10 years
Leasehold improvements	89,399			51,300			shorter of asset life or lease term
	632,310			564,914
Accumulated depreciation and amortization	(320,517		)	(286,064		)
Property and equipment, net	$	311,793		$	278,850

Schedule of reconciliation of changes in asset retirement liability

The following table reconciles changes in our asset retirement liability for fiscal 2018 and 2017 (in thousands):

Asset retirement liability as of October 1, 2016	$	2,796
Payment of asset retirement obligations	(175		)
Adjustment to asset retirement obligations recognized	213
Additional asset retirement obligations due to acquisition	2,325
Accretion recognized	151
Changes due to foreign currency exchange	72
Asset retirement liability as of September 30, 2017	5,382
Adjustment to asset retirement obligations recognized	(123		)
Additional asset retirement obligations due to acquisition	466
Accretion recognized	156
Changes due to foreign currency exchange	(79		)
Asset retirement liability as of September 29, 2018	$	5,802

Schedule of components of reserve for warranty costs

Components of the reserve for warranty costs during fiscal 2018, 2017 and 2016 were as follows (in thousands):

	Fiscal
	2018			2017			2016
Beginning balance	$	36,149		$	15,949		$	15,308
Additions related to current period sales	58,865			41,365			21,859
Warranty costs incurred in the current period	(51,935		)	(31,825		)	(21,393		)
Accruals resulting from acquisitions	179			14,314			—
Adjustments to accruals related to foreign exchange and other	(3,038		)	(3,654		)	175
Ending balance	$	40,220		$	36,149		$	15,949

Schedule of information necessary to calculate basic and diluted earnings (loss) per share

The following table presents information necessary to calculate basic and diluted earnings per share (in thousands, except per share data):

	Fiscal
	2018			2017			2016
Weighted average shares outstanding—basic	24,572			24,487			24,142
Dilutive effect of employee stock awards	279			290			273
Weighted average shares outstanding—diluted	24,851			24,777			24,415
Net income from continuing operations	$	247,360		$	208,644		$	87,502
Loss from discontinued operations, net of income taxes	(2		)	(1,522		)	—
Net income	$	247,358		$	207,122		$	87,502