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Business Combinations - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Feb. 29, 2020 | Nov. 30, 2019 | Feb. 23, 2019 | Feb. 29, 2020 | Feb. 23, 2019
Business Acquisition [Line Items] |  |  |  |  |
Acquisition related costs |  | $ 600 |  | $ 600 |
Newmar |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Pro forma net revenues | $ 626,810 |  | $ 579,163 | 1,368,527 | $ 1,242,949
Pro forma net income | $ 23,361 |  | $ 15,841 | $ 40,561 | $ 26,511
Pro forma income per share - basic (in dollars per share) | $ 0.69 |  | $ 0.47 | $ 1.23 | $ 0.79
Pro forma income per share - diluted (in dollars per share) | $ 0.69 |  | $ 0.47 | $ 1.21 | $ 0.79
Acquisition related costs |  |  |  | $ 10,600 |
Newmar | Amortization of intangibles (1 year or less useful life) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Nonrecurring adjustments | $ 8,023 |  | $ (4,400) | 10,274 | $ (13,610)
Newmar | Increase in amortization of intangibles |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Nonrecurring adjustments | (6) |  | (1,394) | (1,059) | (2,789)
Newmar | Expenses related to business combination (transaction costs) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Nonrecurring adjustments | 0 |  | (648) | 9,950 | (11,254)
Newmar | Interest to reflect new debt structure |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Nonrecurring adjustments | (304) |  | (4,624) | (3,671) | (9,170)
Newmar | Taxes related to the adjustments to the pro forma data and to the income of Newmar |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Nonrecurring adjustments | $ (1,619) |  | $ 1,530 | $ (2,452) | $ 4,585

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