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Income Taxes | 12 Months Ended
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Aug. 29, 2020
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes Income tax expense consisted of the following:
(in thousands) | 2020 |  | 2019 |  | 2018
Current |  |  |  |  |
Federal | $ | 14,318 |  |  | $ | 16,433 |  |  | $ | 28,874 |
State | 2,806 |  |  | 3,138 |  |  | 5,215 |
Total | 17,124 |  |  | 19,571 |  |  | 34,089 |
Deferred |  |  |  |  |
Federal | (790) |  |  | 6,395 |  |  | 5,123 |
State | (500) |  |  | 1,145 |  |  | 1,071 |
Total | (1,290) |  |  | 7,540 |  |  | 6,194 |
Provision for income taxes | $ | 15,834 |  |  | $ | 27,111 |  |  | $ | 40,283 |
The following table provides a reconciliation of the U.S. statutory income tax rate to the Company's effective income tax rate:
| 2020 |  | 2019 |  | 2018
U.S. federal statutory rate(1) | 21.0 | % |  | 21.0 | % |  | 25.9 | %
State taxes, net of federal benefit | 1.9 | % |  | 2.9 | % |  | 3.0 | %
Impact from Tax Act | — | % |  | — | % |  | 2.6 | %
Domestic production activities deduction | — | % |  | — | % |  | (2.2) | %
Income tax credits | (2.5) | % |  | (4.5) | % |  | (0.5) | %
Nondeductible compensation | 0.9 | % |  | — | % |  | — | %
Tax-free and dividend income | (0.6) | % |  | (0.5) | % |  | (0.4) | %
Uncertain tax position settlements and adjustments | 0.1 | % |  | 0.9 | % |  | 0.1 | %
Other items | (0.3) | % |  | (0.3) | % |  | (0.3) | %
Effective tax provision rate | 20.5 | % |  | 19.5 | % |  | 28.2 | %
(1) The U.S. federal statutory rate for Fiscal 2018 is a blended rate, which includes the impact of the Tax Cuts and Jobs Act (the "Tax Act") enactment. The Company's effective tax rate increased to 20.5% for Fiscal 2020 from 19.5% for Fiscal 2019 due primarily to the favorable impact in the prior year of research and development credits partially offset by the reduction in annual pre-tax income in Fiscal 2020. The tax effects of temporary differences that give rise to deferred income taxes were as follows:
(in thousands) | August 29, 2020 |  | August 31, 2019
Warranty reserves | $ | 13,969 |  |  | $ | 10,949 |
Deferred compensation | 5,406 |  |  | 3,989 |
Self-insurance reserve | 3,426 |  |  | 2,617 |
Stock-based compensation | 2,865 |  |  | 2,558 |
Accrued vacation | 1,681 |  |  | 1,227 |
Unrecognized tax benefit | 498 |  |  | 444 |
Inventory | 717 |  |  | — |
Leases | 8,638 |  |  | — |
Other(1) | 3,295 |  |  | 3,337 |
Total deferred tax assets | 40,495 |  |  | 25,121 |
Convertible notes | 3,125 |  |  | — |
Intangibles | 32,933 |  |  | 28,055 |
Depreciation | 11,715 |  |  | 8,192 |
Inventory | — |  |  | 906 |
Leases | 8,330 |  |  | — |
Total deferred tax liabilities | 56,103 |  |  | 37,153 |
Total deferred income tax liabilities, net | $ | 15,608 |  |  | $ | 12,032 |
(1) At August 29, 2020, other includes $0.5 million related to state net operating losses. At August 31, 2019, other includes $0.6 million and $0.4 million related to federal and state net operating losses, respectively. These net operating losses are subject to various expiration periods from 5 years to no expiration. We have evaluated all the positive and negative evidence and consider it more likely than not that these carryforwards can be realized before expiration. Changes in the unrecognized tax benefits are as follows:
(in thousands) | 2020 |  | 2019 |  | 2018
Balance at beginning of year | $ | 2,822 |  |  | $ | 1,220 |  |  | $ | 1,195 |
Gross increases-tax positions in a prior year | 2,486 |  |  | 1,173 |  |  | 25 |
Gross increases-current year tax positions | 522 |  |  | 429 |  |  | — |
Balance at end of year | 5,830 |  |  | 2,822 |  |  | 1,220 |
Accrued interest and penalties | 681 |  |  | 769 |  |  | 525 |
Total unrecognized tax benefits | $ | 6,511 |  |  | $ | 3,591 |  |  | $ | 1,745 |
The amount of unrecognized tax benefits is not expected to change materially within the next 12 months. If the remaining uncertain tax positions are ultimately resolved favorably, $2.9 million of unrecognized tax benefits would have a favorable impact on the Company's effective tax rate. It is the Company's policy to recognize interest and penalties accrued relative to unrecognized tax benefits in income tax expense. The Company files a U.S. Federal tax return, as well as returns in various international and state jurisdictions. Although certain years are no longer subject to examination by the Internal Revenue Service ("IRS") and various state taxing authorities, net operating loss carryforwards generated in those years may still be adjusted upon examination by the IRS or state taxing authorities. As of August 29, 2020, the Company's federal returns from Fiscal 2017 to present are subject to review by the IRS. With limited exception, state returns from Fiscal 2016 to present continue to be subject to review by state taxing jurisdictions. Several years may lapse before an uncertain tax position is audited and finally resolved and it is difficult to predict the outcome of such audits.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32857-109319 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32705-109319 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 270 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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