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Income Taxes (Tables) | 12 Months Ended
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Sep. 29, 2019
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 29, 2019 |  | September 30, 2018 |  | October 1, 2017
| (in thousands)
Income before income taxes: |  |  |  |  |  |  |  |
United States | $ | 185,535 |  |  | $ | 180,034 |  |  | $ | 166,074 |
Foreign | (10,399 | ) |  | (5,472 | ) |  | 5,687 |
Total income before income taxes | $ | 175,136 |  |  | $ | 174,562 |  |  | $ | 171,761 |
Schedule of components of income tax expense | Income tax expense consisted of the following:
| Fiscal Year Ended
| September 29, 2019 |  | September 30, 2018 |  | October 1, 2017
|  |  | (in thousands) |  |
Current: |  |  |  |  |  |  |  |
Federal | $ | 30,051 |  |  | $ | 46,840 |  |  | $ | 45,604 |
State | 8,923 |  |  | 9,228 |  |  | 8,860 |
Foreign | 15,016 |  |  | 10,897 |  |  | 9,337 |
Total current income tax expense | 53,990 |  |  | 66,965 |  |  | 63,801 |
Deferred: |  |  |  |  |  |  |  |
Federal | (9,108 | ) |  | (22,072 | ) |  | (4,251 | )
State | (1,195 | ) |  | (1,471 | ) |  | (945 | )
Foreign | (27,312 | ) |  | (5,817 | ) |  | (4,761 | )
Total deferred income tax expense | (37,615 | ) |  | (29,360 | ) |  | (9,957 | )
Total income tax expense | $ | 16,375 |  |  | $ | 37,605 |  |  | $ | 53,844 |
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 29, 2019 |  | September 30, 2018 |  | October 1, 2017
Tax at federal statutory rate | 21.0% |  | 24.5% |  | 35.0%
State taxes, net of federal benefit | 3.4 |  | 4.2 |  | 3.4
Research and Development ("R&D") credits | (4.7) |  | (1.4) |  | (1.8)
Domestic production deduction | — |  | (0.2) |  | (0.7)
Tax differential on foreign earnings | 1.0 |  | 0.5 |  | —
Non-taxable foreign interest income | (1.7) |  | (2.0) |  | (2.9)
Goodwill | 0.9 |  | 1.7 |  | —
Stock compensation | (2.4) |  | (2.7) |  | (2.8)
Valuation allowance | (13.5) |  | (0.5) |  | (0.5)
Change in uncertain tax positions | 2.4 |  | 1.9 |  | 1.8
Revaluation of deferred taxes | (1.4) |  | (8.4) |  | —
Deferred tax adjustments | (0.4) |  | 2.1 |  | —
Transition tax on foreign earnings | 1.4 |  | — |  | —
Other | 3.3 |  | 1.8 |  | (0.2)
Total income tax expense | 9.3% |  | 21.5% |  | 31.3%
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 29, 2019 |  | September 30, 2018
| (in thousands)
Deferred Tax Assets: |  |  |  |  |
State taxes | $ | 764 |  |  | $ | 1,220 |
Reserves and contingent liabilities | 5,500 |  |  | 2,646 |
Allowance for doubtful accounts | 7,506 |  |  | 4,259 |
Accrued liabilities | 28,232 |  |  | 19,611 |
Stock-based compensation | 6,700 |  |  | 6,338 |
Loss carry-forwards | 39,782 |  |  | 23,492 |
Valuation allowance | (20,543 | ) |  | (21,479 | )
Total deferred tax assets | 67,941 |  |  | 36,087 |
Deferred Tax Liabilities: |  |  |  |  |
Unbilled revenue | (21,886 | ) |  | (25,819 | )
Prepaid expense | (3,026 | ) |  | (3,524 | )
Intangibles | (26,482 | ) |  | (23,319 | )
Property and equipment | (1,133 | ) |  | (4,984 | )
Total deferred tax liability | (52,527 | ) |  | (57,646 | )
Net deferred tax assets (liabilities) | $ | 15,414 |  |  | $ | (21,559 | )
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 29, 2019 |  | September 30, 2018 |  | October 1, 2017
| (in thousands)
Beginning balance | $ | 8,328 |  |  | $ | 9,337 |  |  | $ | 22,786 |
Additions for current year tax positions | 1,342 |  |  | 1,928 |  |  | 1,060 |
Additions for prior year tax positions | 356 |  |  | 1,116 |  |  | 2,365 |
Reductions for prior year tax positions | (100 | ) |  | — |  |  | (6,875 | )
Settlements | (757 | ) |  | (4,053 | ) |  | (9,999 | )
Ending balance | $ | 9,169 |  |  | $ | 8,328 |  |  | $ | 9,337 |

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