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Condensed Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands | Class A Common Stock [Member] Common Stock [Member] | Class A Common Stock [Member] Retained Earnings [Member] Regular Dividends [Member] | Class A Common Stock [Member] Retained Earnings [Member] Special Dividends [Member] | Class A Common Stock [Member] Treasury Stock [Member] | Class A Common Stock [Member] | Class B Common Stock [Member] Common Stock [Member] | Class B Common Stock [Member] Retained Earnings [Member] Regular Dividends [Member] | Class B Common Stock [Member] Retained Earnings [Member] Special Dividends [Member] | Class B Common Stock [Member] | Additional Paid-In-Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Treasury Stock [Member] | Total Shareholders' Equity Attributable to MSC Industrial [Member] | Noncontrolling Interest [Member] | Total
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Balance, Value at Aug. 31, 2019 | $ 46 |  |  |  |  | $ 10 |  |  |  | $ 659,226 | $ 946,651 | $ (22,776) | $ (104,607) |  | $ 5,329 |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  |  |  | 723 |  |  | 95 | $ 818
Net Income |  |  |  |  |  |  |  |  |  |  | 120,918 |  |  |  | 90 | 120,918
Associate Incentive Plans | 1 |  |  |  |  |  |  |  |  | 22,431 |  |  | 2,057 |  |  |
Repurchase of Class A common stock, Value |  |  |  | $ (3,208) |  |  |  |  |  |  |  |  |  |  |  |
Exchange of Class B common stock for Class A common stock, value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  | $ (67,939) | $ (226,984) |  |  |  | $ (15,242) | $ (50,650) |  |  |  |  |  |  |  |
Dividend equivalents declared, net of cancellations |  |  |  |  |  |  |  |  |  |  | (3,358) |  |  |  |  |
Balance, Value at Feb. 29, 2020 | 47 |  |  |  |  | 10 |  |  |  | 681,657 | 703,396 | (22,053) | (105,758) | $ 1,257,299 | 5,514 | 1,262,813
Dividends declared per common share |  |  |  |  | $ 6.50 |  |  |  | $ 6.50 |  |  |  |  |  |  |
Balance, Value at Nov. 30, 2019 | 46 |  |  |  |  | 10 |  |  |  | 668,668 | 970,139 | (21,310) | (106,690) |  | 5,503 |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  |  |  | (743) |  |  | (45) | (788)
Net Income |  |  |  |  |  |  |  |  |  |  | 55,500 |  |  |  | 56 | 55,500
Associate Incentive Plans | 1 |  |  |  |  |  |  |  |  | 12,989 |  |  | 1,131 |  |  |
Repurchase of Class A common stock, Value |  |  |  | (199) |  |  |  |  |  |  |  |  |  |  |  |
Exchange of Class B common stock for Class A common stock, value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  | (34,048) | (226,984) |  |  |  | (7,597) | (50,650) |  |  |  |  |  |  |  |
Dividend equivalents declared, net of cancellations |  |  |  |  |  |  |  |  |  |  | (2,964) |  |  |  |  |
Balance, Value at Feb. 29, 2020 | 47 |  |  |  |  | 10 |  |  |  | 681,657 | 703,396 | (22,053) | (105,758) | 1,257,299 | 5,514 | 1,262,813
Dividends declared per common share |  |  |  |  | 5.75 |  |  |  | 5.75 |  |  |  |  |  |  |
Balance, Value at Aug. 29, 2020 | 47 |  |  |  |  | 10 |  |  |  | 690,739 | 749,515 | (21,418) | (103,948) |  | 5,628 | 1,320,573
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  |  |  | 2,612 |  |  | 210 | 2,822
Net Income |  |  |  |  |  |  |  |  |  |  | 56,539 |  |  |  | 586 | 56,539
Associate Incentive Plans |  |  |  |  |  |  |  |  |  | 22,011 |  |  | 1,822 |  |  |
Repurchase of Class A common stock, Value |  |  |  | (3,519) |  |  |  |  |  |  |  |  |  |  |  |
Exchange of Class B common stock for Class A common stock, value | 1 |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  | (69,808) | $ (163,511) |  |  |  | (13,877) | $ (31,840) |  |  |  |  |  |  |  |
Dividend equivalents declared, net of cancellations |  |  |  |  |  |  |  |  |  |  | (3,261) |  |  |  |  |
Balance, Value at Feb. 27, 2021 | 48 |  |  |  |  | 9 |  |  |  | 712,750 | 523,757 | (18,806) | (105,645) | 1,112,113 | 6,424 | 1,118,537
Dividends declared per common share |  |  |  |  | 5.00 |  |  |  | 5.00 |  |  |  |  |  |  |
Balance, Value at Nov. 28, 2020 | 48 |  |  |  |  | 9 |  |  |  | 702,341 | 547,957 | (19,683) | (106,197) |  | 6,412 |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  |  |  | 877 |  |  | (251) | 626
Net Income |  |  |  |  |  |  |  |  |  |  | 18,085 |  |  |  | 263 | 18,085
Associate Incentive Plans |  |  |  |  |  |  |  |  |  | 10,409 |  |  | 912 |  |  |
Repurchase of Class A common stock, Value |  |  |  | $ (360) |  |  |  |  |  |  |  |  |  |  |  |
Exchange of Class B common stock for Class A common stock, value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  | $ (35,047) |  |  |  |  | $ (6,823) |  |  |  |  |  |  |  |  |
Dividend equivalents declared, net of cancellations |  |  |  |  |  |  |  |  |  |  | (415) |  |  |  |  |
Balance, Value at Feb. 27, 2021 | $ 48 |  |  |  |  | $ 9 |  |  |  | $ 712,750 | $ 523,757 | $ (18,806) | $ (105,645) | $ 1,112,113 | $ 6,424 | $ 1,118,537
Dividends declared per common share |  |  |  |  | $ 0.75 |  |  |  | $ 0.75 |  |  |  |  |  |  |

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