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Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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Aug. 31, 2019 | [1] | Jun. 01, 2019 | Mar. 02, 2019 | Dec. 01, 2018 | Sep. 01, 2018 | Jun. 02, 2018 | Mar. 03, 2018 | [2] | Dec. 02, 2017 | Aug. 31, 2019 | Sep. 01, 2018 | Sep. 02, 2017
Net Income Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income attributable to MSC Industrial | $ 66,608 | $ 79,601 | $ 68,424 | $ 74,232 | $ 73,017 | $ 79,069 | $ 117,552 | $ 59,585 | $ 288,865 | $ 329,223 | $ 231,431
Less: Distributed net income available to participating securities |  |  |  |  |  |  |  |  | (45) | (89) | (206)
Less: Undistributed net income available to participating securities |  |  |  |  |  |  |  |  | (75) | (291) | (410)
Undistributed and distributed net income available to common shareholders |  |  |  |  |  |  |  |  | 288,745 | 328,843 | 230,815
Add: Undistributed net income allocated to participating securities |  |  |  |  |  |  |  |  | 75 | 291 | 410
Less: Undistributed net income reallocated to participating securities |  |  |  |  |  |  |  |  | (75) | (290) | (408)
Undistributed and distributed net income available to common shareholders |  |  |  |  |  |  |  |  | $ 288,745 | $ 328,844 | $ 230,817
Weighted average shares outstanding for basic net income per share |  |  |  |  |  |  |  |  | 55,245 | 56,355 | 56,591
Effect of dilutive securities |  |  |  |  |  |  |  |  | 263 | 352 | 380
Weighted average shares outstanding for diluted net income per share |  |  |  |  |  |  |  |  | 55,508 | 56,707 | 56,971
Basic | $ 1.21 | $ 1.44 | $ 1.24 | $ 1.34 | $ 1.30 | $ 1.40 | $ 2.08 | $ 1.06 | $ 5.23 | $ 5.84 | $ 4.08
Diluted | $ 1.20 | $ 1.44 | $ 1.24 | $ 1.33 | $ 1.29 | $ 1.39 | $ 2.06 | $ 1.05 | $ 5.20 | $ 5.80 | $ 4.05
Potentially dilutive securities |  |  |  |  |  |  |  |  | 1,080 | 207 |
[1] | In the fourth quarter of fiscal 2019, the Company recorded $6,725 of severance and separation benefits charges and other related costs associated with workforce reduction and increased performance management. The net income per share impact from these charges were $0.09 in the fourth quarter of fiscal 2019.
[2] | In the second quarter of fiscal 2018, the Company recorded a net tax benefit of $41,199 due to the revaluation of its net deferred tax liabilities primarily related to the lower federal corporate tax rate, partially offset by the lower federal benefit for state taxes and the change from a worldwide tax system to a territorial tax system, and a net tax benefit of $16,929 attributable to the lower effective tax rate required to bring our first half into alignment with the expected full-year rate.

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