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Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Shares [Member] | Additional Paid-In Capital (APIC) [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Aug. 30, 2014 | $ 192,748 | $ 25,888 | $ 31,672 | $ 554,496 | $ (1,808) | $ (417,500)
Beginning balance (in shares) at Aug. 30, 2014 |  | 51,776 |  |  |  | (24,727)
Creation/utilization of APIC pool due to stock award | 124 |  | 124 |  |  |
Issuance of restricted stock | 1,410 |  | (1,950) |  |  | $ 3,360
Issuance of restricted stock (in shares) |  |  |  |  |  | 199
Stock-based compensation, net of forfeitures | 2,221 |  | 2,172 |  |  | $ 49
Stock-based compensation, net of forfeitures (in shares) |  |  |  |  |  | 3
Payments for the purchase of common stock | (6,519) |  |  |  |  | $ (6,519)
Payments for the purchase of common stock (in shares) |  |  |  |  |  | (300)
Cash dividends paid on common stock | (9,765) |  |  | (9,765) |  |
Prior service cost and actuarial loss, net of tax | (2,917) |  |  |  | (2,917) |
Plan amendment, net of tax | 2,451 |  |  |  | 2,451 |
Change in fair value of interest rate swap, net of tax | 0 |  |  |  |  |
Net income | 41,210 |  |  | 41,210 |  |
Ending balance at Aug. 29, 2015 | 220,963 | $ 25,888 | 32,018 | 585,941 | (2,274) | $ (420,610)
Ending balance (in shares) at Aug. 29, 2015 |  | 51,776 |  |  |  | (24,825)
Creation/utilization of APIC pool due to stock award | 33 |  | 33 |  |  |
Issuance of restricted stock | 517 |  | (1,309) |  |  | $ 1,826
Issuance of restricted stock (in shares) |  |  |  |  |  | 108
Stock-based compensation, net of forfeitures | 2,058 |  | 1,975 |  |  | $ 83
Stock-based compensation, net of forfeitures (in shares) |  |  |  |  |  | 5
Payments for the purchase of common stock | (3,066) |  |  |  |  | $ (3,066)
Payments for the purchase of common stock (in shares) |  |  |  |  |  | (163)
Cash dividends paid on common stock | (10,891) |  |  | (10,891) |  |
Prior service cost and actuarial loss, net of tax | (4,452) |  |  |  | (4,452) |
Plan amendment, net of tax | 17,701 |  |  |  | 17,701 |
Change in fair value of interest rate swap, net of tax | 0 |  |  |  |  |
Net income | 45,496 |  |  | 45,496 |  |
Ending balance at Aug. 27, 2016 | 268,359 | $ 25,888 | 32,717 | 620,546 | 10,975 | $ (421,767)
Ending balance (in shares) at Aug. 27, 2016 |  | 51,776 |  |  |  | (24,875)
Creation/utilization of APIC pool due to stock award | 470 |  | 470 |  |  |
Issuance of restricted stock | 808 |  | (1,821) |  |  | $ 2,629
Issuance of restricted stock (in shares) |  |  |  |  |  | 155
Stock-based compensation, net of forfeitures | 2,908 |  | 2,830 |  |  | $ 78
Issuance of stock for acquisition | 124,066 |  | 46,205 |  |  | $ 77,861
Issuance of stock for acquisition (in shares) |  |  |  |  |  | 4,586
Stock-based compensation, net of forfeitures (in shares) |  |  |  |  |  | 5
Payments for the purchase of common stock | (1,531) |  |  |  |  | $ (1,531)
Payments for the purchase of common stock (in shares) |  |  |  |  |  | (54)
Cash dividends paid on common stock | (12,738) |  |  | (12,738) |  |
Prior service cost and actuarial loss, net of tax | (15,387) |  |  |  | (15,387) |
Plan amendment, net of tax | 3,903 |  |  |  | 3,903 |
Change in fair value of interest rate swap, net of tax | (514) |  |  |  | (514) |
Net income | 71,330 |  |  | 71,330 |  |
Ending balance at Aug. 26, 2017 | $ 441,674 | $ 25,888 | $ 80,401 | $ 679,138 | $ (1,023) | $ (342,730)
Ending balance (in shares) at Aug. 26, 2017 |  | 51,776 |  |  |  | (20,183)

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