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Business Combination (Tables) | 12 Months Ended
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Aug. 31, 2019
Business Combinations [Abstract] |
Schedule of Business Acquisitions, by Acquisition [Table Text Block] | On November 8, 2016, we acquired 100% of the ownership interests of Grand Design RV, LLC ("Grand Design") in accordance with the Securities Purchase Agreement for an aggregate purchase price of $520.5 million, which was paid in cash and Winnebago common stock shares as follows:
(in thousands, except shares) | November 8, 2016
Cash | $ | 396,442 |
Winnebago shares: 4,586,555 at $27.05 per share | 124,066 |
Total | $ | 520,508 |
Business Acquisition, Results included in Consolidation [Table Text Block] | The following table provides net revenues and operating income (which includes amortization expense) from the Grand Design business included in our consolidated results during Fiscal 2019, 2018, and 2017 following the November 8, 2016 closing date:
(in thousands) | 2019 |  | 2018 |  | 2017
Net revenues | $ | 1,069,862 |  |  | $ | 969,362 |  |  | $ | 559,664 |
Operating income | 145,900 |  |  | 129,123 |  |  | 54,188 |
Business Acquisition, Pro Forma Information [Table Text Block] | Unaudited pro forma information is as follows:
(in thousands, except per share data) | 2017(1)
Net revenues | $ | 1,642,786 |
Net income | 91,163 |
Income per share - basic | 2.89 |
Income per share - diluted | 2.88 |
(1) | Net income and income per share include the increased benefit of $16.3 million, net of tax, associated with the termination of the postretirement health care plan in Fiscal 2017.
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] | The unaudited pro forma data above includes the following significant non-recurring adjustments made to account for certain costs which would have changed if the acquisition of Grand Design had been completed on August 30, 2015:
(in thousands) | 2017
Amortization of intangibles (1 year or less useful life)(1) | $ | (18,751 | )
Increase in amortization of intangibles(1) | 1,551 |
Expenses related to business combination (transaction costs)(2) | (6,649 | )
Interest to reflect new debt structure(3) | 3,672 |
Taxes related to the adjustments to the pro forma data and to the income of Grand Design | 11,648 |
(1) | Refer to Note 7, Goodwill and Intangible Assets, for additional information on the intangible assets recorded as a result of the acquisition.
(2) | Pro forma transaction costs include $0.1 million incurred by Grand Design prior to the acquisition.
(3) | Refer to Note 9, Long-Term Debt, for additional information on the new debt structure as a result of the acquisition.

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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