Balance Sheet Details (Tables)

6 Months Ended

Mar. 31, 2018

Balance Sheet Related Disclosures [Abstract]

Schedule of inventories

Inventories consist of the following (in thousands):

	March 31, 2018		September 30, 2017
Purchased parts and assemblies	$	137,511	$	114,285
Work-in-process	189,461		159,784
Finished goods	165,714		140,738
Total inventories	$	492,686	$	414,807

Schedule of prepaid expenses and other assets

Prepaid expenses and other assets consist of the following (in thousands):

	March 31, 2018		September 30, 2017
Prepaid and refundable income taxes	$	33,478	$	28,712
Other taxes receivable	20,577		15,327
Prepaid expenses and other assets	31,391		26,229
Total prepaid expenses and other assets	$	85,446	$	70,268

Schedule of other assets

Other assets consist of the following (in thousands):

	March 31, 2018		September 30, 2017
Assets related to deferred compensation arrangements	$	33,740	$	31,008
Deferred tax assets	85,034		82,691
Other assets	8,079		12,942
Total other assets	$	126,853	$	126,641

Schedule of other current liabilities

Other current liabilities consist of the following (in thousands):

	March 31, 2018		September 30, 2017
Accrued payroll and benefits	$	68,203	$	72,327
Deferred revenue	34,608		65,237
Warranty reserve	37,479		36,149
Accrued expenses and other	35,050		34,215
Current liabilities held for sale (See Note 19)	732		7,021
Customer deposits	19,770		20,052
Total other current liabilities	$	195,842	$	235,001

Schedule of components of reserve for warranty costs

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

	Six Months Ended
	March 31, 2018			April 1, 2017
Beginning balance	$	36,149		$	15,949
Additions related to current period sales	24,290			16,135
Warranty costs incurred in the current period	(24,212		)	(15,105		)
Accruals resulting from acquisitions	179			14,314
Adjustments to accruals related to foreign exchange and other	1,073			(507		)
Ending balance	$	37,479		$	30,786

Schedule of other long-term liabilities

Other long-term liabilities consist of the following (in thousands):

	March 31, 2018		September 30, 2017
Long-term taxes payable	$	60,259	$	35,866
Deferred compensation	37,137		34,160
Deferred tax liabilities	45,360		45,373
Deferred revenue	4,724		4,765
Asset retirement obligations liability	5,078		5,382
Defined benefit plan liabilities	41,719		39,454
Other long-term liabilities	1,006		1,390
Total other long-term liabilities	$	195,283	$	166,390