Income Taxes (Tables)

12 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of income before income taxes, by geographical area

The income before income taxes, by geographic area, was as follows:

	Fiscal Year Ended
	September 30, 2018			October 1, 2017		October 2, 2016
	(in thousands)
Income before income taxes:
United States	$	180,034		$	166,074	$	113,576
Foreign	(5,472		)	5,687		10,890
Total income before income taxes	$	174,562		$	171,761	$	124,466

Schedule of components of income tax expense

Income tax expense consisted of the following:

	Fiscal Year Ended
	September 30, 2018			October 1, 2017			October 2, 2016
				(in thousands)
Current:
Federal	$	46,840		$	45,604		$	22,277
State	9,228			8,860			5,634
Foreign	10,897			9,337			6,651
Total current income tax expense	66,965			63,801			34,562
Deferred:
Federal	(22,072		)	(4,251		)	6,231
State	(1,471		)	(945		)	(16		)
Foreign	(5,817		)	(4,761		)	(164		)
Total deferred income tax expense	(29,360		)	(9,957		)	6,051
Total income tax expense	$	37,605		$	53,844		$	40,613

Schedule of reconciliation of income tax expense and effective income tax rates

Total income tax expense was different from the amount computed by applying the U.S. federal statutory rate to pre-tax income as follows:

	Fiscal Year Ended
	September 30, 2018	October 1, 2017	October 2, 2016
Tax at federal statutory rate	24.5%	35.0%	35.0%
State taxes, net of federal benefit	4.2	3.4	3.1
Research and Development ("R&D") credit	(1.4)	(1.8)	(3.4)
Domestic production deduction	(0.2)	(0.7)	(0.7)
Tax differential on foreign earnings	0.5	—	(1.6)
Non-taxable foreign interest income	(2.0)	(2.9)	(3.9)
Non-deductible executive compensation	—	—	2.0
Goodwill	1.7	—	—
Stock compensation	(2.7)	(2.8)	0.3
Valuation allowance	(0.5)	(0.5)	2.4
Change in uncertain tax positions	1.9	1.8	(2.0)
Revaluation of deferred taxes	(8.4)	—	—
Deferred tax adjustments	2.1	—	—
Other	1.8	(0.2)	1.4
Total income tax expense	21.5%	31.3%	32.6%

Schedule of temporary differences comprising the net deferred income tax liability

Temporary differences comprising the net deferred income tax liability shown on the accompanying consolidated balance sheets were as follows:

	Fiscal Year Ended
	September 30, 2018			October 1, 2017
	(in thousands)
Deferred Tax Assets:
State taxes	$	1,220		$	598
Reserves and contingent liabilities	2,646			2,941
Allowance for doubtful accounts	4,259			4,273
Accrued liabilities	19,611			22,466
Stock-based compensation	6,338			10,069
Loss carry-forwards	23,492			28,261
Valuation allowance	(21,479		)	(25,326		)
Total deferred tax assets	36,087			43,282
Deferred Tax Liabilities:
Unbilled revenue	(25,819		)	(46,408		)
Prepaid expense	(3,524		)	(6,253		)
Intangibles	(23,319		)	(24,328		)
Property and equipment	(4,984		)	(8,311		)
Total deferred tax liability	(57,646		)	(85,300		)
Net deferred tax liabilities	$	(21,559	)	$	(42,018	)

Reconciliation of the beginning and ending amounts of unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	Fiscal Year Ended
	September 30, 2018			October 1, 2017			October 2, 2016
	(in thousands)
Beginning balance	$	9,337		$	22,786		$	21,618
Additions for current year tax positions	1,108			1,060			2,802
Additions for prior year tax positions	3,478			2,365			1,466
Reductions for prior year tax positions	—			(6,875		)	(3,100		)
Settlements	(4,496		)	(9,999		)	—
Ending balance	$	9,427		$	9,337		$	22,786